Twentieth century climate change: evidence from small glaciers.

Twentieth century climate change: evidence from small glaciers. Research Abstract Details 

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Twentieth century climate change: evidence from small glaciers. Abstract Text:

M B Dyurgerov,M F Meier,

The relation between changes in modern glaciers, not including the ice sheets of Greenland and Antarctica, and their climatic environment is investigated to shed light on paleoglacier evidence of past climate change and for projecting the effects of future climate warming on cold regions of the world. Loss of glacier volume has been more or less continuous since the 19th century, but it is not a simple adjustment to the end of an "anomalous" Little Ice Age. We address the 1961-1997 period, which provides the most observational data on volume changes. These data show trends that are highly variable with time as well as within and between regions; trends in the Arctic are consistent with global averages but are quantitatively smaller. The averaged annual volume loss is 147 mm small middle dotyr(-1) in water equivalent, totaling 3.7 x 10(3) km(3) over 37 yr. The time series shows a shift during the mid-1970s, followed by more rapid loss of ice volume and further acceleration in the last decade; this is consistent with climatologic data. Perhaps most significant is an increase in annual accumulation along with an increase in melting; these produce a marked increase in the annual turnover or amplitude. The rise in air temperature suggested by the temperature sensitivities of glaciers in cold regions is somewhat greater than the global average temperature rise derived largely from low altitude gauges, and the warming is accelerating.

Twentieth century climate change: evidence from small glaciers. Publishing Authors By Initials

MB Dyurgerov,MF Meier,

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Twentieth century climate change: evidence from small glaciers. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Proceedings of the National Academy of Sciences of

VOLUME: 97

Page Numbers: 1406-11

Journal Abbreviation: Proc. Natl. Acad. Sci. U.S.A.

ISSN: 0027-8424

DAY: 15

MONTH: Feb

YEAR: 2000

Twentieth century climate change: evidence from small glaciers. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Twentieth century climate change: evidence from small glaciers.

AFFILIATION: Institute of Arctic and Alpine Research and Department of Geological Sciences, University of Colorado, Boulder, CO 80309, USA.

Country: United States

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MEDLINETA: Proc Natl Acad Sci U S A

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