Sentences with phrase «ice sheet mass balance»

In fact, there are now well over 150 individual assessments of ice sheet mass balance based on measurements acquired by at least 15 different satellite missions.

The study of ice sheet mass balance underwent two major advances, one during the early 1990s, and again early in the 2000s.

Scientists monitor ice sheet mass balance through a variety of techniques.

In light of these developments, it is now time for an updated community assessment of ice sheet mass balance.

That estimate was based in part on the fact that sea level is now rising 3.2 mm / yr (3.2 m / millennium)[57], an order of magnitude faster than the rate during the prior several thousand years, with rapid change of ice sheet mass balance over the past few decades [23] and Greenland and Antarctica now losing mass at accelerating rates [23]--[24].

Scientists have adopted three general approaches to ice sheet mass balance measurement: comparing outflow and melt to snowfall accumulation (the mass budget method), observing changes in glacier elevation (volume change or geodetic method), and detecting changes in the Earth's gravity field over the ice sheet (gravimetric method).

Because Antarctica drains more than 80 percent of its ice sheet through floating ice shelves, accelerated glacier flow has the potential to affect ice sheet mass balance dramatically and raise sea level (Pritchard et al. 2012).

E., Greenland ice sheet mass balance reconstruction.

The ICESat mission provided multi-year elevation data needed to determine ice sheet mass balance as well as cloud property information.

The impacts of ice shelf collapse and ensuing glacier acceleration are substantial, but in general, the effects of ocean melt are proving to be far more important in controlling ice sheet mass balance.

Going forwards, IMBIE provides a framework for assessing ice sheet mass balance, and has an explicit aim to widen participation to enable the entire scientific community to become involved.

Alley, R. B., Spencer, M. K. & Anandarkrishnan, S. Ice sheet mass balance: Assessment, attribution and prognosis.

Skeptic Argument: Ice Sheet losses are overestimated Response: Wu et al (2010) use a new method to calculate ice sheet mass balance.

That estimate was based in part on the fact that sea level is now rising 3.2 mm / yr (3.2 m / millennium)[57], an order of magnitude faster than the rate during the prior several thousand years, with rapid change of ice sheet mass balance over the past few decades [23] and Greenland and Antarctica now losing mass at accelerating rates [23]--[24].

Shepherd et al., 2012 A reconciled estimate of ice sheet mass balance.

The «best» estimates for this scenario are 28 cm for thermal expansion, 12 cm for glaciers and -3 cm for the ice sheet mass balance — note the IPCC still assumes that Antarctica gains more mass in this manner than Greenland loses.

However, net loss of ice mass could occur if dynamical ice discharge dominates the ice sheet mass balance.

The software developed will combine individual assessments of ice sheet mass balance to determine a reconciled estimate of ice sheet mass balance, taking into account the spatial and temporal domain of the input data and their uncertainties, and generate summary graphical and tabulated output.

A key area of glaciological study in recent years is ice sheet mass balance.

(Ice sheet mass balance (MB) is the difference between surface mass balance (SMB) and solid ice discharge across the grounding line (D).)

IMBIE has led to improved confidence in the measurement of ice sheet mass balance and the associated global sea - level contribution.

The ice sheet mass balance inter-comparison exercise (IMBIE) was established in 2011 as a community effort to reconcile satellite measurements of ice sheet mass balance.

Hay et al. (2015) argue that rates of sea level rise between 1.0 and 1.4 mm yr - 1 close the sea - level budget for 1901 — 1990 as estimated in AR5, without appealing to an underestimation of individual contributions from ocean thermal expansion, glacier melting, or ice sheet mass balance.

As with IMBIE 2012, it will collate, compare, integrate, interpret, and report satellite estimates of ice sheet mass balance, with the overall aim of producing a community assessment of Greenland and Antarctica's ongoing contributions to global sea level rise.