Sentences with phrase «ice mass changes for»

Figure 2: Time series of ice mass changes for the Greenland ice sheet estimated from GRACE monthly mass solutions for the period from April 2002 to February 2009.

Figure 2: Ice mass changes for the Antarctic ice sheet from April 2002 to February 2009.

Not exact matches

For more than a decade these Earth - observing satellites have provided some of the first environmental measurements on a global scale, including large - scale changes in the mass of polar ice.

This implies that large - scale observations — for example, of global mean sea - level change or of the change mass of the Antarctic ice sheet — will not on their own significantly narrow the range of late - century sea - level projections for decades to come.

This spring, NASA and the German Research Centre for Geosciences are scheduled to launch the Gravity Recovery and Climate Experiment Follow - On (GRACE - FO) mission, twin satellites that will continue the original GRACE mission's legacy of tracking fluctuations in Earth's gravity field in order to detect changes in mass, including the mass of ice sheets and aquifers.

I do think it has been clear for a while that interactions with the ocean provide the greatest potential for surprises and rapid changes, and that Greenland's ice sheet would mostly pull out of the ocean before it lost most of its mass.

Given the level of denialism in the face of glacial mass loss, plummeting Arctic summer ice cover, progressive collapse of ice shelves that have been stable for 6000 to 10000 years, northward, upward, and seasonally earlier movements of ecosystems and other phenological changes, increasing Greenland ice melt, and all the other direct observations of global warming, I think denialists will go to their graves believing it can't be happening.

Figure 3: Estimated ice mass change over time for the entire Antarctic ice sheet, West Antarctica, West Antarctica without the rapidly changing Amundsen Sea Coast (ASC) region and East Antarctica.

Postscript: A grouping of 40 + scientists, including four of our Nature co-authors, participated in the NASA / ESA Ice Sheet Mass Balance Intercomparison project (IMBIE) in an attempt to understand the reasons for previously disparate ice mass change estimatIce Sheet Mass Balance Intercomparison project (IMBIE) in an attempt to understand the reasons for previously disparate ice mass change estimatice mass change estimates.

The mass balance and d13C balance shows that vegetation as sink is not large enough to absorb all human CO2 if the oceans are a source and ice cores show that CO2 and temperature go to a (surprisingly linear) new equilibrium for every change in temperature level, not a sustained increase or decrease.

Because ice sheets contain so much ice and have the potential to raise or lower global sea level so dramatically, measuring the mass balance of the ice sheets and tracking any mass balance changes and their causes is very important for forecasting sea level rise.

Then in 2003 the launch of two new satellites, ICESat and GRACE, led to vast improvements in one of the methods for mass balance determination, volume change, and introduced the ability to conduct gravimetric measurements of ice sheet mass over time.

Things that could increase to higher: 1) Sun effects 2) Ocean effects 3) Feedbacks related to changing ice mass 4) Continue whatever reason for the warming over the last 400 years.

«Models traditionally have projected that this difference doesn't become negative (i.e. net loss of Antarctic ice sheet mass) for several decades,» Mann said, adding that detailed gravimetric measurements, which looks at changes in Earth's gravity over spots to estimate, among other things, ice mass.

When doing this with sea level data, as with OHC, as with tropospheric sensible heat, as with glacial ice mass loss, we are seeing a background, longer - term change that is non-linear, and for several decades now, accelerating.

The most - optimal values for changes in bedrock elevation (GIA) in response to ice sheet mass changes have to be used

Data for the modern rate of annual ice sheet mass changes indicate an accelerating rate of mass loss consistent with a mass loss doubling time of a decade or less (Fig. 10).

-- the atmospheric concentration of CO2 and other GHG's; — the reflective & absorptive characteristics, as a function of wavelength, for the GHG's; — the specific heat and mass of the earth's intermediate - term heat - storage media — the oceans (primarily) and the atmosphere; — the quantity of heat absorbed by phase - changes = ice - melt; and by chemical / biological processes.

Alternative explanations are available, for example that climatic changes are responsible for changes in continental ice mass that affect volcanic activity.

There is also no basis on which to postulate significant change in ice mass for those epochs.

In 2007, Denmark launched the Programme for Monitoring of the Greenland Ice Sheet (PROMICE) to assess changes in the mass balance of the ice sheIce Sheet (PROMICE) to assess changes in the mass balance of the ice sheice sheet.

Thirteen years of GRACE data provide an excellent picture of the current mass changes of Greenland and Antarctica, with mass loss in the GRACE period 2002 - 15 amounting to 265 ± 25 GT / yr for Greenland (including peripheral ice caps), and 95 ± 50 GT / year for Antarctica, corresponding to 0.72 mm / year and 0.26 mm / year average global sea level change.

Estimates of the decadal variability in ice sheet mass loss (11) suggest the impact on acceleration estimates is ∼ 0.014 mm / y2 for a 25 - y time series, in the absence of rapid dynamical changes in the ice sheets.