Sentences with phrase «changing snow extent»

Not exact matches

Consistent with observed changes in surface temperature, there has been an almost worldwide reduction in glacier and small ice cap (not including Antarctica and Greenland) mass and extent in the 20th century; snow cover has decreased in many regions of the Northern Hemisphere; sea ice extents have decreased in the Arctic, particularly in spring and summer (Chapter 4); the oceans are warming; and sea level is rising (Chapter 5).

Since IPCC (2001) the cryosphere has undergone significant changes, such as the substantial retreat of arctic sea ice, especially in summer; the continued shrinking of mountain glaciers; the decrease in the extent of snow cover and seasonally frozen ground, particularly in spring; the earlier breakup of river and lake ice; and widespread thinning of antarctic ice shelves along the Amundsen Sea coast, indicating increased basal melting due to increased ocean heat fluxes in the cavities below the ice shelves.

According to the recent report by the Intergovernmental Panel on Climate Change satellite data show that there are very likely to have been decreases of about 10 % in the extent of snow cover since the late 1960s.

Lastly, there is significant independent evidence for warming in the oceans, snow cover and sea ice extent changes.

Abrupt and severe temperature shifts have occurred on occasion in the past, typically separated by hundreds of years or more, but shifts of this magnitude that are global in extent have almost always occurred during glacial eras, when the extent of snow and ice allowed for great changes in feedback in response to only modest signals.

Combine the satellite trend with the surface observations and the umpteen non-temperature based records that reflect temperature change (from glaciers to phenology to lake freeze dates to snow - cover extent in spring & fall to sea level rise to stratospheric temps) and the evidence for recent gradual warming is, well, unequivocal.

A reduced snow cover extent in the mountainous West changes the peak river flow, as does timing of increases in heavy and extreme precipitation reported in the United States, which is best reflected during the warm season.

THERE HAS BEEN A WARMING TREND FROM THE 70s THRU THE LATE 90s,... accompanied by other changes tied to a warming trend (record low arctic sea ice extent & thickness, retreating glaciers, retreating snow lines, warming ocean surface temps, increases in sea height, de-alkalinizing oceans).

Researchers at CIRES» National Snow and Ice Data Center [About NSIDC] investigate the dynamics of Antarctic ice shelves, new techniques for the remote sensing of snow and freeze / thaw cycle of soils, the role of snow in hydrologic modeling, linkages between changes in sea ice extent and weather patterns, large - scale shifts in polar climate, river and lake ice, and the distribution and characteristics of seasonally and permanently frozen groSnow and Ice Data Center [About NSIDC] investigate the dynamics of Antarctic ice shelves, new techniques for the remote sensing of snow and freeze / thaw cycle of soils, the role of snow in hydrologic modeling, linkages between changes in sea ice extent and weather patterns, large - scale shifts in polar climate, river and lake ice, and the distribution and characteristics of seasonally and permanently frozen grosnow and freeze / thaw cycle of soils, the role of snow in hydrologic modeling, linkages between changes in sea ice extent and weather patterns, large - scale shifts in polar climate, river and lake ice, and the distribution and characteristics of seasonally and permanently frozen grosnow in hydrologic modeling, linkages between changes in sea ice extent and weather patterns, large - scale shifts in polar climate, river and lake ice, and the distribution and characteristics of seasonally and permanently frozen ground.

Only in this way is the energy balance determined empirically and the multitude of changes — cloud height and extent, water vapour, ozone, surface temperature, ice and snow, biology, aerosols — integrated in a comprehensible measure.

This Section places particular emphasis on current knowledge of past changes in key climate variables: temperature, precipitation and atmospheric moisture, snow cover, extent of land and sea ice, sea level, patterns in atmospheric and oceanic circulation, extreme weather and climate events, and overall features of the climate variability.

That is why the change in snow cover extent in winter has not been a point of focus in documenting climate change.

One last point related to my last post, is the extent / degree of magnitude of a more meridional atmospheric circulation pattern (N.H. especially) could influence snow cover, cloud cover, and precipitation amounts which could set up stronger positive climatic feedbacks, which could then result in an even more significant climatic change going forward.

While it is generally accepted that the observed reduction of the Northern Hemisphere spring snow cover extent (SCE) is linked to warming of the climate system caused by human induced greenhouse gas emissions, it has been difficult to robustly quantify the anthropogenic contribution to the observed change.

The point of focus has been the very large changes from April - July in snow cover extent.

Snow extent is an important climate variable to monitor when assessing climate change, as it is closely associated with temperature, moisture and atmospheric circulation, as well as with other cryospheric variables.

The report tracks patterns, changes, and trends of the global climate system, including: greenhouse gases; temperatures throughout the atmosphere, ocean, and land; cloud cover; sea level; ocean salinity; sea ice extent; and snow cover.

... These results suggest that snow cover may be a sensitive indicator of climate change, and that North American snow extent will probably decrease in response to greenhouse gas emissions, although the magnitude of the response may be nonlinear.

Meier et al. (National Snow and Ice Data Center); 4.7 ± 0.6; Statistical This statistical method uses previous years» daily extent change rates from July 1 through September 30 to calculate projected daily extents starting from June 30.