Arctic Sea Ice Decline: Observations, Projections, by Eric T. DeWeaver, Cecilia M. Bitz, L.-Bruno Tremblay

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By Eric T. DeWeaver, Cecilia M. Bitz, L.-Bruno Tremblay

Published through the yankee Geophysical Union as a part of the Geophysical Monograph Series.

This quantity addresses the quick decline of Arctic sea ice, putting fresh sea ice decline within the context of previous observations, weather version simulations and projections, and easy types of the weather sensitivity of sea ice. Highlights of the paintings provided right here contain

  • An appraisal of the function performed by way of wind forcing in riding the decline;
  • A reconstruction of Arctic sea ice stipulations sooner than human observations, in response to proxy info from sediments;
  • A modeling technique for assessing the impression of sea ice decline on polar bears, used as enter to the U.S. Fish and natural world Service's choice to checklist the polar undergo as a threatened species lower than the Endangered Species Act;
  • Contrasting reviews at the lifestyles of a "tipping point," past which Arctic sea ice decline becomes (or has already develop into) irreversible, together with an exam of the function of the small ice cap instability in international warming simulations;
  • A major summertime atmospheric reaction to sea ice relief in an atmospheric common flow version, suggesting a favorable suggestions and the possibility of momentary weather prediction.

The ebook may be of curiosity to researchers trying to comprehend the hot habit of Arctic sea ice, version projections of destiny sea ice loss, and the implications of sea ice loss for the ordinary and human structures of the Arctic.

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Extra resources for Arctic Sea Ice Decline: Observations, Projections, Mechanisms, and Implications

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The solid line and the dashed line correspond to the modern mean winter sea ice cover limit and the extreme sea ice limit, respectively. serve the isotopic composition of the water mass in which foraminifera have formed their carbonate shell. The isotopic composition of seawater is thus a function of its salinity. It is regulated by its dilution with 18O-depleted meteoritic waters or by its concentration with some 18O enrichment due to evaporative processes. However, it is also affected by the freezing of water that acts as a fractionation process for salt versus 18O properties.

Along the eastern Greenland margins, within the limit of the mean sea ice edge, dinocyst data consistently yield underestimated sea ice cover values. This illustrates a bias that may result from a discrep- ancy in the sea ice cover from the time interval included in the surface sediments (hundreds of years) and that of the last decades. On the average, dinocyst estimates that represent the last hundreds of years suggest less sea ice than during the last decades along the eastern Greenland margin (Figure 4).

T. 1029/ 2002PA000873. , and V. A. Klimanov (2000), Quantitative Holocene climatic reconstruction from Arctic Russia, J. , 24, 81–91. , and D. D. Eberl (2007), Quantitative mineralogy of surface sediments on the Iceland shelf, and application to down- core studies of Holocene ice-rafted sediments, J. Sediment. , 77, 469–479. , X. Crosta, O. Romero, and J. J. Pichon (2005), The biogeography of major diatom taxa in Southern Ocean sediments. 1. Sea-ice related species, Palaeogeogr. Palaeoclimatol.

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