Sentences with phrase «open polar water»
Dr. McCarthy said he would report the encounter with open polar water to environmental scientists and consult other scientists to see if new satellite remote - sensing data have detected the extent of the melting.
https://www.nytimes.com/
While cautioning against jumping to dire conclusions based on the sighting of open polar water, Dr. Serreze of the ice data center is the principal author of a review article, published this summer in the Dutch journal Climate Change, on Arctic environmental change over decades and centuries.
Not exact matches
As a result of atmospheric patterns that both warmed the air and reduced cloud cover as well as increased residual heat in newly exposed ocean waters, such melting helped open the fabled Northwest Passage for the first time [see photo] this summer and presaged tough times for polar bears and other Arctic animals that rely on sea ice to survive, according to the U.S. Geological Survey.
a) Satellite image showing fast disintegration of sea ice over a polar continental shelf; b) Zoobenthos on an Antarctic continental shelf; c) Examples of sea mosses (specimens on the left are from an open - water location and hence have had more plankton to feed on); and d) Dead bryozoan and other benthic skeletons covering the seabed, most likely to be buried, sequestering their blue carbon in the seabed.
Collapsing ice shelves and melting sea ice leaves more open water in the Earth's polar regions (photo a in earlier figure).
The paper, «Long - distance swimming by polar bears (Ursus maritimus) of the southern Beaufort Sea during years of extensive open water,» is published in the Canadian Journal of Zoology.
Over all, open water has spread in the Arctic this summer nearly as much as it did last summer, when polar experts said the ice cap shrank far more than had been measured since satellites started scanning the region 30 years ago — and probably more than it had shrunk in a century or more.
Historically, there had not been enough open water for polar bears in this region to swim the long distances we observed in these recent summers of extreme sea ice retreat.»
On a related front, a new paper in the journal Nature Communications (available in full online) projects deep reductions in litter size in the polar bear population along the western shores of Hudson Bay, should the open - water season continue to lengthen as foreseen under the warming influence of accumulating greenhouse gases.
It is not that the polar regions are amplifying the warming «going on» at lower latitudes, it is that any warming going on AT THE POLES is amplified through inherent positive feedback processes AT THE POLES, and specifically this is primarily the ice - albedo positive feedback process whereby more open water leads to more warming leads to more open water, etc. *** «Climate model simulations have shown that ice albedo feedbacks associated with variations in snow and sea - ice coverage are a key factor in positive feedback mechanisms which amplify climate change at high northern latitudes...»
It is not that the polar regions are amplifying the warming «going on» at lower latitudes, it is that any warming going on AT THE POLES is amplified through inherent positive feedback processes AT THE POLES, and specifically this is primarily the ice - albedo positive feedback process whereby more open water leads to more warming leads to more open water, etc..
The mass of waters which cover a great part of the globe, and the ice of the polar regions, oppose a less obstacle to the admission of luminous heat, than to the heat without light, which returns in a contrary direction to open space.
Global warming has a larger affect in polar areas, as the loss of snow and ice leads to more open water, which absorbs more sunlight and warmth.
A polar bear gazes at the open water in the Arctic Ocean.
In contrast during the most recent decade with more open water, the number of ringed seal pups in the western Hudson Bay tripled relative to the 1990s.4 With more seal pups the polar bears» body condition also improved.
... observations suggested the bears drowned in rough seas and high winds and «suggest that drowning - related deaths of polar bears may increase in the future if the observed trend of regression of pack ice and / or longer open water periods continues.»
All the graphs, stats, equations, characteristics of the scientific method, or facts from physics are replaced by an image of a lone polar bear swimming in open water.
However, the fact that polar bears in the Chukchi Sea and Southern Davis Strait are thriving despite dramatic declines in summer sea ice (aka an extended open - water season), proves my point and disproves their premise.
«During aerial surveys in September 1987 — 2003, a total of 315 live polar bears were observed with 12 (3.8 %) animals in open water, defined for purposes of this analysis as marine waters > 2 km north of the Alaska Beaufort Sea coastline or associated barrier islands.
Schliebe, S., K. D. Rode, J. S. Gleason, J. Wilder, K. Proffitt, T. J. Evans, and S. Miller, 2008: Effects of sea ice extent and food availability on spatial and temporal distribution of polar bears during the fall open - water period in the Southern Beaufort Sea.
We further suggest that drowning - related deaths of polar bears may increase in the future if the observed trend of regression of pack ice and / or longer open water periods continues.
Average distance from land and pack ice edge for live polar bears swimming in open water in 2004 (n = 10) were 8.3 ± 3.0 and 177.4 ± 5.1 km, respectively.
During aerial surveys in early September, 2004, 55 polar bears (Ursus maritimus) were seen, 51 were alive and of those 10 (19.9 %) were in open water.
For example, reductions in seasonal sea ice cover and higher surface temperatures may open up new habitat in polar regions for some important fish species, such as cod, herring, and pollock.128 However, continued presence of cold bottom - water temperatures on the Alaskan continental shelf could limit northward migration into the northern Bering Sea and Chukchi Sea off northwestern Alaska.129, 130 In addition, warming may cause reductions in the abundance of some species, such as pollock, in their current ranges in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.134
This natural variation in population size is seldom mentioned by those who rush to blame all polar bear subpopulation declines on recent increases in the open water season.
Tagged Beaufort, Chukchi Sea, Hudson Bay, ice cover, melt, open water, polar bear, polynya, sea ice, seals, shore leads, winds
That warming extends the 50 m or so to the seabed because we are dealing with only a polar surface water layer here (over the shelves the Arctic Ocean structure is one - layer rather than three layers) and the surface warming is mixed down by wave - induced mixing because the extensive open water permits large fetches.
Wilder presents these numbers as a basis for saying how concerned he is that a longer open - water season in the Arctic could increase the number of attacks by polar bears — and he's right, that's a valid concern now that the global population of bears is so high.