The Greenland ice sheet has been one of the largest contributors to global sea-level rise over the past 20 years, accounting for 0.5 mm yr−1 of a total of 3.2 mm yr−1. A significant portion of this contribution is associated with the speed-up of an increased number of glaciers in southeast and northwest Greenland. Here, we show that the northeast Greenland ice stream, which extends more than 600 km into the interior of the ice sheet, is now undergoing sustained dynamic thinning, linked to regional warming, after more than a quarter of a century of stability. This sector of the Greenland ice sheet is of particular interest, because the drainage basin area covers 16% of the ice sheet (twice that of Jakobshavn Isbræ) and numerical model predictions suggest no significant mass loss for this sector, leading to an under-estimation of future global sea-level rise. The geometry of the bedrock and monotonic trend in glacier speed-up and mass loss suggests that dynamic drawdown of ice in this region ...
1] Acidity peaks in Greenland ice cores have been used as critical reference horizons for synchronizing ice core records, aiding the construction of a single Greenland Ice Core Chronology (GICC05) for the Holocene. Guided by GICC05, we examined sub-sections of three Greenland cores in the search for tephra from specific eruptions that might facilitate the linkage of ice core records, the dating of prehistoric tephras and the understanding of the eruptions. Here we report the identification of 14 horizons with tephra particles, including 11 that have not previously been reported from the North Atlantic region and that have the potential to be valuable isochrons. The positions of tephras whose major element data are consistent with ash from the Katmai AD 1912 and Öraefajökull AD 1362 eruptions confirm the annually resolved ice core chronology for the last 700 years. We provide a more refined date for the so-called "AD860B" tephra, a widespread isochron found across NW Europe, and present new ...
The new findings reveal higher temperatures in Northern Greenland during the Eemian than paleo-climate models have estimated," said Dahl-Jensen.. The researchers looked at surface elevation and ice thickness in the early and later parts of the Eemian. Following the previous glacial period, 128,000 years before present, the surface elevation in the vicinity of NEEM was 200 meters higher than the present and the ice thickness decreased at a very high rate of 6 centimeters per year. Some 122,000 years before the present, the surface elevation was 130 meters below the present. In the late Eemian, 122,000 to 115,000 before present, the surface elevation remained stable at a level of 130 meters below the present with an ice thickness of 2,400 meters.. The research team estimated the Greenland ice sheets volume reduced by no more than 25 percent over 6,000 years. The rate of elevation change in the early part of the Eemian was high and the loss of mass from the Greenland ice sheet was likely on the ...
Greenland ice cores provide excellent evidence of past abrupt climate changes. However, there is no universally accepted theory of how and why these Dansgaard-Oeschger (DO) events occur. Several mechanisms have been proposed to explain DO events, including sea ice, ice shelf buildup, ice sheets, atmospheric circulation, and meltwater changes. DO event temperature reconstructions depend on the stable water isotope (δ18O) and nitrogen isotope measurements from Greenland ice cores: interpretation of these measurements holds the key to understanding the nature of DO events. Here, we demonstrate the primary importance of sea ice as a control on Greenland ice core δ18O: 95% of the variability in δ18O in southern Greenland is explained by DO event sea ice changes. Our suite of DO events, simulated using a general circulation model, accurately captures the amplitude of δ18O enrichment during the abrupt DO event onsets. Simulated geographical variability is broadly consistent with available ice core ...
A new paper from the 2011 Antarctic Science Symposium presents new ice core data from Greenland and finds that not even the southern portion of Greenland was ice-free during the Eemian period, despite temperatures much higher than the present (5°C or 9°F) lasting for 16,000 years (from 130,000 to 114,000 years ago). Meanwhile, alarmists such as Richard Alley (buddy of Michael Mann at Penn State) and James Hansen claim "The entire ice mass of Greenland will disappear from the world map if temperatures rise by as little as 2°C." Note global temperatures have recovered by a mere 0.7°C since the end of the Little Ice Age in 1850 and have been flat to declining since 1998 ...
For some reason, this item does not want to post to the DML despite multiple tries... ---------- Forwarded message ---------- From: Ben Creisler ,[email protected], Date: Mon, Nov 10, 2014 at 10:48 AM Subject: Phytosaurs from Greenland (news) To: [email protected] Ben Creisler [email protected] ,From a blocked earlier posting to the DML. Phytosaurs (two adults, a juvenile and a baby) from Triassic of Greenland with video (in Portuguese) http://observador.pt/2014/11/05/eram-assim-os-crocodilos-da-gronelandia/ ,From SVP meeting: THE LATE TRIASSIC OF JAMESON LAND REVISITED: NEW VERTEBRATE FINDINGS AND THE FIRST PHYTOSAUR FROM GREENLAND MATEUS, Octávio ; CLEMMENSEN, Lars ; KLEIN, Nicole ; WINGS, Oliver ; FROBØSE, Nicolaij; MILÀN, Jesper ; ADOLFSSEN, Jan Schulz ; ESTRUP, Eliza SVP Poster 2014 An expedition to Jameson Land (East Greenland) was conducted in July of 2012, involving twelve researchers and technicians from Denmark, Germany, and Portugal. The fieldwork focused on two sites: ...
The purpose of this study was to compare the frontal sinus size of ancient Greenlandic Inuit with ancient Inuit of Alaska and Canada, and to compare sinus size between ancient and modern Greenlandic...
The contribution of ice sheets to the global biogeochemical cycle of phosphorus is largely unknown, due to the lack of field data. Here we present the first comprehensive study of phosphorus export from two Greenland Ice Sheet glaciers. Our results indicate that the ice sheet is a hot spot of phosphorus export in the Arctic. Soluble reactive phosphorus (SRP) concentrations, up to 0.35 µM, are similar to those observed in Arctic rivers. Yields of SRP are among the highest in the literature, with denudation rates of 17-27 kg P km−2 yr−1. Particulate phases, as with nonglaciated catchments, dominate phosphorus export (,97% of total phosphorus flux). The labile particulate fraction differs between the two glaciers studied, with significantly higher yields found at the larger glacier (57.3 versus 8.3 kg P km−2 yr−1). Total phosphorus yields are an order of magnitude higher than riverine values reported in the literature. We estimate that the ice sheet contributes ~15% of total bioavailable ...
Enjoy an exhilirating hike up Quassussuaq Mountain, following a trail that offers spectacular views of Nuuk and the fjords beyond.. A short drive from the pier brings you to the foothills of Quassussuaq Mountain, which overlooks Nuuk, the worlds smallest capital and Greenlands biggest town. The hike will begin at a relaxed pace and before long you will enter the unspoiled terrain so prevalent in this part of the country.. Expect the views to be spectacular as you ascend and gaze out over Nuuk, which means "headland." From your elevated vantage point, you will understand why it was so named: the city sits at the very tip of a peninsula at the mouth of an extensive fjord system.. The hike up Quassussuaq, also known as Little Malene, offers an ever-changing landscape. You will pass streams and small lakes and see the ski resort near Nuuks airport. There will be plenty of short breaks to enjoy the scenery. After a while, you will stop for a picnic style sandwich lunch at one of the prettiest ...
GREENLAND (Danish, &c., Gronland), a large continental island, the greater portion of which lies within the Arctic Circle, while the whole is arctic in character. It is not connected with any portion of Europe or America except by suboceanic ridges; but in the extreme north it is separated only by a narrow strait from Ellesmere Land in the archipelago of the American continent. It is bounded on the east by the North Atlantic, the Norwegian and Greenland Seas-Jan Mayen, Iceland, the Faeroe Islands and the Shetlands being the only lands between it and Norway. Denmark Strait is the sea between it and Iceland, and the northern Norwegian Sea or Greenland Sea separates it from Spitsbergen. On the west Davis Strait and Baffin Bay separate it from Baffin Land. The so-called bay narrows northward into the strait successively known as Smith Sound, Kane Basin, Kennedy Channel and Robeson Channel. A submarine ridge, about 300 fathoms deep at its deepest, unites Greenland with Iceland (across Denmark ...
Surface meltwater that drains to the bed of the Greenland Ice Sheet each summer causes changes in ice flow that cannot be fully explained by prevailing theories. Now a multinational, multidisciplinary team led by ice sheet modelers at Los Alamos National Laboratory is exploring how changes in extensive, sediment-choked subglacial swamps actually explain why the ice sheets movement slows down in late summer and winter.
Author(s): MacGregor, Joseph A; Fahnestock, Mark A; Catania, Ginny A; Aschwanden, Andy; Clow, Gary D; Colgan, William T; Gogineni, S Prasad; Morlighem, Mathieu; Nowicki, Sophie MJ; Paden, John D; Price, Stephen F; Seroussi, Hélène | Abstract: The basal thermal state of an ice sheet (frozen or thawed) is an important control upon its evolution, dynamics and response to external forcings. However, this state can only be observed directly within sparse boreholes or inferred conclusively from the presence of subglacial lakes. Here we synthesize spatially extensive inferences of the basal thermal state of the Greenland Ice Sheet to better constrain this state. Existing inferences include outputs from the eight thermomechanical ice-flow models included in the SeaRISE effort. New remote-sensing inferences of the basal thermal state are derived from Holocene radiostratigraphy, modern surface velocity and MODIS imagery. Both thermomechanical modeling and remote inferences generally agree that the Northeast
The feasibility of using satellite data for climate research over the Greenland ice sheet is discussed. In particular, we demonstrate the usefulness of Advanced Very High Resolution Radiometer (AVHRR)
The Greenland ice sheet may disappear permanently at a much lower global temperature increase than previously thought, according to research recently ..
How can robots help scientists canvas unchartered territory in the worlds coldest, most desolate regions? ClimateWires Lauren Morello explores a National Science Foundation-funded project to perfect Yeti Robot and Cool Robot to collect data on the Greenland ice sheet. Click here to read the special report.. ...
Estimating the exact size of the Greenland Sea is based on where the sea actually ends, so all known measurements are estimates, at best. Most reference sources report a surface area near 465,000 sq miles (1,205,000 sq km).. Average depth runs near 1,450 meters (4,750 ft), while the maximum depth of the North Sea is measured at 4,800 meters (16,000 ft).. The very cold East Greenland current flows south and carries icebergs through the Denmark Strait, and on into the Atlantic Ocean. Because of arctic ice, the northern reaches of the sea are seldom navigated by commercial vessels.. ...
Greenlands glaciers are dumping ice into the Atlantic Ocean at an alarming rate, according to a statement by the environmental group Greenpeace on Wednesday.. Increasingly warm temperatures have caused glaciers to melt over time and shed masses of ice that eventually slip into fjords and the sea.. Greenlands Helheim glacier, which is four miles wide and almost one mile thick, moves approximately 25 yards a day, Greenpeace said in a statement.. The group said that is double the speed as when its Arctic Sunrise vessel last took a trip to Greenland in 2005.. Another major glacier in Greenland, Kangerdlugssuaq, is moving even faster. It has been observed moving around 38 yards every day or about 8.5 miles each year, Greenpeace said.. "Kangerdlugssuaq Glacier is probably the worlds fastest moving glacier," said Dr. Gordon Hamilton, from the University of Maines Climate Change Institute.. Hamilton is taking part in this years Greenpeace excursion, which is now examining the glaciers north and ...
Fahrs disease or syndrome is a rare inherited or sporadic neurological disorder with a prevalence of less than 1/1,000,000 [1]. Recently, a number of genes have been identified, known to be associated with familial primary brain calcification (PFBC), causing Fahrs disease or syndrome [1]. These genes are SCL20A2, PDGFB, PDGFRB and XPR1, and a significant correlation was found between the presence of headache in PDGFB mutations, and parkinsonism with SLC20A2 [2].. We present the case of a 49-year-old woman with Greenlandic Inuit origin and an otherwise unremarkable medical history. She initially presented with symptoms of headache and diplopia. She was referred to a CT scan of the cerebrum, which showed bilateral calcifications of the thalamus and corpus striatum (Figures 1 and 2) compatible with Fahrs syndrome [1]. Shortly after, the patient developed tremor of the right hand, fatigability especially of her right side, dizziness, and minor cognitive decline.. ...
satellite survey. "The Greenland ice sheet could be facing an irreversible decline by the end of the century.". The survey, published in the December 2005 issue of the Journal of Glaciology (www.igsoc.org), combines new satellite mapping of the height of the worlds great ice sheets and previous NASA airborne mapping of the edges of the Greenland sheet - nine years of Antarctic data and 10.5 years from Greenland - to pinpoint where the ice sheets were thinning and where they were growing.. In Greenland, ice losses along the southeastern coast were countered by an increase in ice depth high in the interior, due to heavy snowfall. But other recent studies have shown accelerated losses in parts of Greenland. Last month a NASA study that included observations through 2005 reported a speed-up of ice flow into the sea from several Greenland glaciers. Zwally suggested this may reflect a change in just the last few years, as his survey ended with 2002s data: "We dont know how long [gains and losses] ...
Aeromagnetic survey in southern West Greenland: project Aeromag 1999 Thorkild M. Rasmussen and Jeroen A.M. van Gool The acquisition of public airborne geophysical data from Greenland that commenced in
The first dogs arrived in the Americas 12,000 years ago. However, people and their dogs did not settle in the Arctic until the Paleo-Eskimo people 4,500 years ago and then the Thule people 1,000 years ago, both originating from Siberia.[1] Dogs first appeared in Greenland around 4,000 years ago.[2][3] The Inuit dogs from Canada (Canadian Eskimo Dog) and Greenland (Greenland Dog) descended from dogs associated with Thule people, who relied on them for transportation from Siberia. In 2015, a study using a number of genetic markers indicated that these were both the same dog and should not be treated as separate breeds, that they maintain an indigenous heritage that predates colonization and the timing corresponds with the arrival of the Thule people, and that they were distinct from Siberian Huskies, Alaskan Huskies and Malamutes. The maternal mitochondrial DNA sequences of the Inuit dogs were classified as haplotype A31 that indicates a common female ancestor, and this haplotype could not be ...
Off Greenland, and along the Labrador coast, the Greenland sharks tend to approach the surface in winter, often coming right up to the ice. But most of them withdraw in summer to 100 fathoms or deeper. And the few that visit our Gulf appear to hold rather closely to the bottoms of the deeper troughs, though a stray may come so close to the shore now and then, and into water so shoal as to blunder into a fish weir; one such event is on record for Passamaquoddy Bay. This is one of the most sluggish of sharks, offering no resistance whatever when hooked, and it is entirely inoffensive to man.[45] But it is extremely [page 55] rapacious. It devours any carrion eagerly, such as whale meat, blubber from whaling operations, or the carcasses of young seals that are left on the ice off the Newfoundland-Labrador coasts. And its habit of gathering when there has been a big killing of narwhals in Greenland waters is proverbial. Apart from carrion (which cannot be available except on rare occasions), its ...
AllAboutCounseling.coms treatment for addiction directory of Greenland luxury drug rehab programs is your trusted resource to find a top executive drug treatment rehab provider to overcome a drinking problem, end alcohol abuse or substance abuse or get related help.. Each month thousands use our guide to find local inpatient substance abuse recovery facilities in Greenland, New Hampshire by simply browsing our inpatient treatment for addiction center listings, many of which contain ratings and reviews. Helping yourself to put a stop to a binge drinking problem can be just a click or call away!. ...
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We have been ringing Greenland White-fronted Geese in west Greenland since 1979, part of a long term study of this population which breeds in West Greenland and winters exclusively in Ireland and Britain. Before 1950, the Whitefront was the only common goose species nesting on the west coast of Greenland. At that time, there were very few Canada Geese records from Greenland at all, but although the species began to increase subsequently, it was still described as a rare and irregular breeding bird confined to the Disko Bay region of West Greenland in the early 1980s. Since then, there has been a spectacular increase in numbers (see Auk 113: 231-233 and Goose Specialist Group Bulletin 7: 23-25) and the species is now a very common breeder on many parts of Disko Island (69·N), the adjacent Nuussuaq Peninsula (70·N) and further north on the Svartenhuk Peninsula (71·N).. In our small study area of Isungua, just north of Søndre Strømfjord airport (67º08N, 50º30W), we first encountered Canada ...
Within this project we will map and characterise the coastal zone in NE Greenland based on remote sensing. We will derive intertidal zones, shallow water bathymetry and classification of coastal types based on both commercial VHR imagery and publically available satellite imagery. Validation will be carried out by in situ measurements in the shallow waters of Vega Sund. Besides Asiaq, the Greenland Institute for Natural Resources and DHI Gras A/S are project members. ...
The figure below shows the total daily contribution from all points on the ice sheet (top) and the same accumulated from September 1st to now (bottom). The blue curves show this seasons surface mass balance in gigatons (Gt: 1 Gt is one billion tons and corresponds to 1 cubic kilometer of water), and for comparison the mean curves from the historical model run are shown with two standard deviations on either side. Note that the accumulated curve does not end at 0 at the end of the year. Over the year, it snows more than it melts, but calving of icebergs also adds to the total mass budget of the ice sheet. Satellite observations over the last decade show that the ice sheet is not in balance. The calving loss is greater than the gain from surface mass balance, and Greenland is losing mass at the rate of about 200 Gt/yr. ...
Greenland ice core from ~80 m depth. E. Steig photo.. According to a recent paper on the 2012 melt by Nghiem et al., in Geophysical Research Letters, the 19th century event dates to 1889. One has to go back about 700 years to find the next such event, and overall, these are about once-in-250 year events over the last 4000 years. Prior to that, they occur more frequently - about once per century during the mid Holocene "climatic optimum", when it was on average much warmer than present in Greenland in summer, due to the peak in Northern Hemisphere insolation due to changes in the earths orbit (Milankovitch forcing). Even during the mid-Holocene, though, there is no evidence from the ice cores that there was sufficient melting to create such strong anomalies in the air content and trace gas concentrations in the ice, as was observed in the Eemian in the NEEM ice. Thus, it was even warmer during Eemian than during the mid Holocene.. How much warmer was it? Jason Box estimates from satellite data ...
Another contributor to the melting ice sheets is the warming of the ocean. When ice shelves -- ice still connected to the ice sheet but floating over water -- melt, they also cause the ice sheet to flow faster. In Greenland, the Jakobshavn ice shelf has retreated more than 5 miles since 1992. Rocks and cliffs on the sides of fiords or inlets slow the seaward movement of the ice shelves. If these shelves break up and melt, the ice streams behind them move more rapidly. Ice shelf failures have also occurred on Antarctica where, for example, most of the Larsen B ice shelf disintegrated in March of 2002 and increased the rate of ice stream flow eight times. "Water temperature is more important than air temperature in melting the ice shelves," says Alley. "However, both contribute." Warmer oceans, caused by general global warming or local events can trigger more breakups of ice shelves and faster flow of ice streams in Antarctica. In Greenland, sustained increase in temperatures of only a few degrees ...
4. Graphics 1. Surface and Bedrock maps Figure 2. Surface topography of the Summit region of the Greenland Ice Sheet. Map by S. Hodge et. al. in review. The S mark at grid position x = +9.4 km and y = +31.2 km marks the true summit of the ice sheet with a position of 37 38 W, 72 34 N. The S mark at grid position x = -18.0 km and y = +31.7 km marks the GISP2 camp and drill site with a position of 38 27 37" W, 72 34 38" N. The dashed lines indicate the nominal flight lines used in the mapping survey. Contour interval = 2 meters. Figure 3. Bed topography of the Summit region of the Greenland Ice Sheet. Map by S. Hodge et. al. in review. The S markers represent the same positions as in Figure 2. Contour interval = 20 meters. Figure 4. Surface topography map of the Summit region of the Greenland Ice Sheet showing full extent of the surface strain net survey. Map by Hodge et. al. in review, positions of geoceivers by John Bolzan. The large + is the true summit (x = +9.4 km and y = +31.2 km ), grid ...
Greenland (Greenlandic: Kalaallit Nunaat; Danish: Grønland) [http://www.greenland.com/] is the worlds largest non-continental island, in the far northeast of North America, largely within the Arctic. Although it is still part of the Kingdom of Denmark, it was granted self-government effective in 1979, more recently it voted for more autonomy, in effect making it a separate country with formal ties to Denmark. Some inhabitants are now projecting the eventual road to independence. Copenhagen remains responsible for its foreign affairs, and of course is a source of investment. The closest neighbouring countries are Iceland to the South-East, Canada to the West and Svalbard in Norway to the North-East.
Alexander, P. M., Tedesco, M., Fettweis, X., van de Wal, R. S. W., Smeets, C. J. P. P., and van den Broeke, M. R.: Assessing spatio-temporal variability and trends in modelled and measured Greenland Ice Sheet albedo (2000-2013), The Cryosphere, 8, 2293-2312, https://doi.org/10.5194/tc-8-2293-2014, 2014. a. Alley, R. B. and Joughin, I.: Modeling Ice-Sheet Flow, Science, 336, 551-552, https://doi.org/10.1126/science.1220530, 2012. a. Alvarez-Solas, J., Charbit, S., Ramstein, G., Paillard, D., Dumas, C., Ritz, C., and Roche, D. M.: Millennial-scale oscillations in the Southern Ocean in response to atmospheric CO2 increase, Glob. Planet. Change, 76, 128-136, https://doi.org/10.1016/j.gloplacha.2010.12.004, 2011a. a. Alvarez-Solas, J., Montoya, M., Ritz, C., Ramstein, G., Charbit, S., Dumas, C., Nisancioglu, K., Dokken, T., and Ganopolski, A.: Heinrich event 1: an example of dynamical ice-sheet reaction to oceanic changes, Clim. Past, 7, 1297-1306, https://doi.org/10.5194/cp-7-1297-2011, 2011b. ...
Our (me, Joel Harper, and Shad ONeel) work on estimating the outlet glacier velocities required for Greenland to deliver a really big sea level rise (we looked at 2 m or more) has been submitted for review, so I dont want to go into a lot of details now. However, the idea is simple, and Ive talked about this much in many presentations this winter: Take the amount of ice you need to get rid of from Greenland to raise sea level 2 m in the next century, reduce it by your best estimate of the amount that would be removed by surface mass balance losses, and try to push the rest out of the aggregate cross-sectional area of Greenlands marine-based outlet glaciers. You learn 2 things: 1) the outlet flow speed has to be *really* high, and 2) the volume required is so large that even generously inflated surface mass balance losses cant touch it.. This is a pretty simple calculation, conceptually anyway. The reason its valuable is that for all the recent discussion of fast dynamic contributions to ...
KEY POINTS/HIGHLIGHTSTwo rapid ice-dammed lake drainage events gauged and ice dam geometry measured.A melt enlargement model is developed to examine the evolution of drainage mechanism(s).Lake temperature dominated conduit melt enlargement and we hypothesize a flotation trigger.Glaciological and hydraulic factors that control the timing and mechanisms of glacier lake outburst floods (GLOFs) remain poorly understood. This study used measurements of lake level at 15 min intervals and known lake bathymetry to calculate lake outflow during two GLOF events from the northern margin of Russell Glacier, west Greenland. We used measured ice surface elevation, interpolated subglacial topography and likely conduit geometry to inform a melt enlargement model of the outburst evolution. The model was tuned to best-fit the hydrograph rising limb and timing of peak discharge in both events; it achieved Mean Absolute Errors of
Article Jökulhlaups and sediment transport in Watson River, Kangerlussuaq, West Greenland. For 3 years, during a 4-year observation period (2007–2010), jökulhlaups were observed from a lake at the northern margin of Russells Glet...
There are a dozen or so important Greenland ice cores, but the latest and greatest are GRIP (Greenland Ice Project) and GISP2 (Greenland Ice Sheet Project 2), which were extracted at the Summit where the ice rarely melts. GRIP was dated by counting back annual layers from the surface to c. 14,500 BP (before the present, dated 1950) using electrical conductivity method (ECM, see below) and the rest of the ice core was dated on the basis of flow modeling and chemical techniques. GISP2 was dated by visually counting annual hoar frost layers back to c. 12,000 BP and from 12,000 to 110,000 BP by visually counting annual dust layers. Back to 12,000 BP, this counting was validated by a very close agreement of three independent methods of counting the annual layers. From 12,000 BP back to 40,000 BP, the counting was validated by a very close agreement of two independent methods of counting the annual layers, and from 40,000 BP back to 110,000 BP by a close agreement of two independent methods. Also, ...
For many years, scientists have pondered if the Vikings diaspora to Greenland was made easier by the warmer temperatures of the Medieval Warm Period. Climate data extracted from shells had indicated that this warm period extended to Greenland, but new research looking at glacial movements and using isotope data from terminal moraines suggests this may not necessarily be so ...
Current estimates of global marine primary production range over a factor of two. At high latitudes, the uncertainty is even larger than globally because here in-situ data and ocean color observations are scarce, and the phytoplankton absorption shows specific characteristics due to the low-light adaptation. The improvement of the primary production estimates requires an accurate knowledge on the chlorophyll vertical profile, which is the basis for most primary production models. To date, studies describing the typical chlorophyll profile based on the chlorophyll in the surface layer did not include the Arctic region or, if it was included, the dependence of the profile shape on surface concentration was neglected. The goal of our study was to derive and describe the typical Greenland Sea chlorophyll profiles, categorized according to the chlorophyll concentration in the surface layer and further monthly resolved. The Greenland Sea was chosen because it is known to be one of the most productive ...
1) Miteva, V.I. and Brenchley, J.E. (2005). "Detection and isolation of ultrasmall microorganisms from a 120,000-year-old Greenland glacier ice core". Applied and Environmental Microbiology, 71(12): 7806-18. doi:10.1128/AEM.71.12.7806-7818.2005 (2) Loveland-Curtze, J., Miteva, V.I. and Brenchley, J.E. (2009). "Herminiimonas glaciei sp. nov., a novel ultramicrobacterium from 3042 m deep Greenland glacial ice". International Journal of Systematic and Evolutionary Microbiology, 59(6): 1272-7. doi:10.1099/ijs.0.001685-0 (3) Lang, E., Swiderski, J., Stackebrandt, E., Schumann, P., Spröer, C. and Sahin, N. (2007). "Herminiimonas saxobsidens sp. nov., isolated from a lichen-colonized rock". International Journal of Systematic and Evolutionary Microbiology, 57(11): 2618-22. doi:10.1099/ijs.0.65163-0 (4) (2009). "Herminiimonas Glaciei - Tiny frozen microbe may be clue to extra-terrestrial life". Science 2.0. Retrieved 2012-10-26. (5) Hoover, R.B. and Pikuta, E.V. (2009). "Life in Ice: Implications to ...
New observations of long-distance pollen transport to southern Greenland are recorded during the last 2 weeks of May, 2003. The results indicate northeastern North America as the source area of the transported pollen grains as shown in earlier investigations. Backward trajectories indicate that transport occurred twice during the first week corresponding to a time of maximum pollen flux emitted to the atmosphere in the source area. A large percentage of exotic pollen grains were identified, about 11% of the total counted. However, transport during the second week appears to have occurred during a single day at a time of reduced pollen emission into the atmosphere, which was subjected later to severe washout. As a result, only 1% of the total pollen spectra was identified as exotic grains. The back trajectories modeled by the HYSPLIT application differ somewhat from those previously identified in 2002. Although in both years air passing over southern Greenland at 3000 in carried out the main ...
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CONCORD - The deadly shooting of a police chief and wounding of four police officers in a Greenland drug raid was one of New Hampshires top news stories in 2012.Tributes poured in from all over the country for Greenland Police Chief Michael Maloney, 48, who was days from retirement when he was shot once in the head on April 12 as he scrambled to pull his injured colleagues out of the line of fire.Another big story was the arrest of a traveling medical technician at Exeter Hospital,
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Jack Dibb: University Of New Hampshire This project will include atmospheric radionuclides among the species being measured at the solar-powered atmospheric camp(ATM) that was established in 1989 near Summit, Greenland as part of the Greenland Ice Sheet Project Two(GISP2). The PI will determine the concentrations of 7Be and 210Pb (and perhaps gamma emitting anthropogenic radionuclides) in high volume aerosol samples (collected continuously during the field season at a nominal 24 hour interval) and fresh and aging surface and near surface snow samples. 10Be and 36 will be measured in these samples by Dr. Robert Finkel (Lawrence Livermore National Laboratory) at no cost to NSF. All of the research at ATM has the primary goal of fostering the interpretation of paleoatmospheric and paleoclimatic signals recorded in the ice of the Greenland Ice Sheet. This will be accomplished by improving our understanding of the current day transport proceeded, air-snow transfer processes, and early ...
Our data show that during the Eemian (Note: 125.000 years ago) up to eight degrees Celsius warmer was in Northern Greenland than today," says project leader Professor Dorthe Dahl-Jensen of the University of Copenhagen that the Greenland ice sheet. have not so sensitive to this temperature increase, as previously thought, is the good news of the study "... and waaO:".. these new findings are really exciting to refute not only all horror scenarios where the Greenland ice sheet as part of a Warm Period disappears in a flash. Moreover, you confirm model calculations that have been made ​​already about a decade ago at the Alfred Wegener Institute, "says Prof. Heinrich Miller, co-author of the study and Helmholtz Professor of Glaciology at the Alfred Wegener Institute." ...
North American Ice Sheet Dwindled Fast in Conditions Like TodaysIn the face of warming climate, researchers have yet to agree on how much and how quickly melting of the Greenland ice sheet may contribute to sea level rise.
The genetic architecture of the small and isolated Greenlandic population is advantageous for identification of novel genetic variants associated with cardio-metabolic traits. We aimed to identify genetic loci associated with body mass index (BMI), to expand the knowledge of the genetic and biological mechanisms underlying obesity. Stage 1 BMI-association analyses were performed in 4,626 Greenlanders. Stage 2 replication and meta-analysis were performed in additional cohorts comprising 1,058 Yupik Alaska Native people, and 1,529 Greenlanders. Obesity-related traits were assessed in the stage 1 study population. We identified a common variant on chromosome 11, rs4936356, where the derived G-allele had a frequency of 24% in the stage 1 study population. The derived allele was genome-wide significantly associated with lower BMI (beta (SE), -0.14 SD (0.03), p = 3.2x10-8), corresponding to 0.64 kg/m2 lower BMI per G allele in the stage 1 study population. We observed a similar effect in the Yupik ...
Guest Post by David Middleton Satellites See Unprecedented Greenland Ice Sheet Surface Melt... Right On Time I guess Professor Tedesco missed this... Ice cores from Summit show that melting events of this type occur about once every 150 years on average. With the last one happening in 1889, this event is right on time, says…