Pervasive ice sheet mass loss reflects competing ocean and atmosphere processes

doi:10.1126/science.aaz5845

GSTDTAP > 气候变化

DOI	10.1126/science.aaz5845
	Pervasive ice sheet mass loss reflects competing ocean and atmosphere processes
	Ben Smith; Helen A. Fricker; Alex S. Gardner; Brooke Medley; Johan Nilsson; Fernando S. Paolo; Nicholas Holschuh; Susheel Adusumilli; Kelly Brunt; Bea Csatho; Kaitlin Harbeck; Thorsten Markus; Thomas Neumann; Matthew R. Siegfried; H. Jay Zwally
	2020-06-12
发表期刊	Science
出版年	2020
英文摘要	Earth's ice sheets are melting and sea levels are rising, so it behooves us to understand better which climate processes are responsible for how much of the mass loss. Smith et al. estimated grounded and floating ice mass change for the Greenland and Antarctic ice sheets from 2003 to 2019 using satellite laser altimetry data from NASA's ICESat and ICESat-2 satellites. They show how changing ice flow, melting, and precipitation affect different regions of ice and estimate that grounded-ice loss averaged close to 320 gigatons per year over that period and contributed 14 millimeters to sea level rise. Science , this issue p. [1239][1] Quantifying changes in Earth’s ice sheets and identifying the climate drivers are central to improving sea level projections. We provide unified estimates of grounded and floating ice mass change from 2003 to 2019 using NASA’s Ice, Cloud and land Elevation Satellite (ICESat) and ICESat-2 satellite laser altimetry. Our data reveal patterns likely linked to competing climate processes: Ice loss from coastal Greenland (increased surface melt), Antarctic ice shelves (increased ocean melting), and Greenland and Antarctic outlet glaciers (dynamic response to ocean melting) was partially compensated by mass gains over ice sheet interiors (increased snow accumulation). Losses outpaced gains, with grounded-ice loss from Greenland (200 billion tonnes per year) and Antarctica (118 billion tonnes per year) contributing 14 millimeters to sea level. Mass lost from West Antarctica’s ice shelves accounted for more than 30% of that region’s total. [1]: /lookup/doi/10.1126/science.aaz5845
领域	气候变化 ; 资源环境
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/274469
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Ben Smith,Helen A. Fricker,Alex S. Gardner,et al. Pervasive ice sheet mass loss reflects competing ocean and atmosphere processes[J]. Science,2020.
APA	Ben Smith.,Helen A. Fricker.,Alex S. Gardner.,Brooke Medley.,Johan Nilsson.,...&H. Jay Zwally.(2020).Pervasive ice sheet mass loss reflects competing ocean and atmosphere processes.Science.
MLA	Ben Smith,et al."Pervasive ice sheet mass loss reflects competing ocean and atmosphere processes".Science (2020).