Future Sea Level Change Under Coupled Model Intercomparison Project Phase 5 and Phase 6 Scenarios From the Greenland and Antarctic Ice Sheets

Ice Sheet Model Intercomparison Project (ISMIP6) contribution to CMIP6

Reducing the uncertainty in the past, present, and future contribution of ice sheets to sea-level change requires a coordinated effort between the climate and glaciology communities. The Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6) is the primary activity within the Coupled Model Intercomparison Project – phase 6 (CMIP6) focusing on the Greenland and Antarctic ice sheets. In this ...

Ice sheets and sea level.

Increasing rates of ice mass loss from the Greenland and Antarctic ice sheets revealed by GRACE

[1] We use monthly measurements of time-variable gravity from the GRACE (Gravity Recovery and Climate Experiment) satellite gravity mission to determine the ice mass-loss for the Greenland and Antarctic Ice Sheets during the period between April 2002 and February 2009. We find that during this time period the mass loss of the ice sheets is not a constant, but accelerating with time, i.e., that ...

The Southern Ocean in the Coupled Model Intercomparison Project phase 5

The Southern Ocean is an important part of the global climate system, but its complex coupled nature makes both its present state and its response to projected future climate forcing difficult to model. Clear trends in wind, sea-ice extent and ocean properties emerged from multi-model intercomparison in the Coupled Model Intercomparison Project phase 3 (CMIP3). Here, we review recent analyses o...

Greenland—Antarctic phase relations and millennial time-scale climate fluctuations in the Greenland ice-cores

The Greenland (GRIP/GISP2) and Antarctic (Byrd) ice-cores are examined in the frequency domain, with the data synchronized using common methane variations. Using conventional time-series analysis, a simple picture emerges: there is low-frequency (periods longer than about 10 kyr) coherence between the two records, consistent with a simple time delay, Antarctica leading by 1– 2 kyr: Two geograph...