Sentences with phrase «observed global sea ice»

pdf cited by Will ««Observed global sea ice area, defined here as a sum of N. Hemisphere and S. Hemisphere sea ice areas, is near or slightly lower than those observed in late 1979.»

Not exact matches

Evidence of past glacial advance and retreat is also more easily observed in the Dry Valleys, providing a window into the past behavior of the vast Antarctic ice sheets and their influence on global sea levels.

However, the simulations indicate that the sea - ice driven precipitation changes resemble the global rainfall patterns observed during that drought, leaving the possibility that Arctic sea - ice loss could have played a role in the recent drought.

Many of the global climate models have been unable to explain the observed increase in Antarctic sea ice.

When these ice shelves suddenly splinter and weaken or even collapse entirely, as has been observed in Antarctica, the glaciers that feed them speed up, dumping more ice into the ocean and raising global sea levels.

Here are some possible choices — in order of increasing sophistication: * All (or most) scientists agree (the principal Gore argument) * The 20th century is the warmest in 1000 years (the «hockeystick» argument) * Glaciers are melting, sea ice is shrinking, polar bears are in danger, etc * Correlation — both CO2 and temperature are increasing * Sea levels are rising * Models using both natural and human forcing accurately reproduce the detailed behavior of 20th century global temperature * Modeled and observed PATTERNS of temperature trends («fingerprints») of the past 30 years agsea ice is shrinking, polar bears are in danger, etc * Correlation — both CO2 and temperature are increasing * Sea levels are rising * Models using both natural and human forcing accurately reproduce the detailed behavior of 20th century global temperature * Modeled and observed PATTERNS of temperature trends («fingerprints») of the past 30 years agSea levels are rising * Models using both natural and human forcing accurately reproduce the detailed behavior of 20th century global temperature * Modeled and observed PATTERNS of temperature trends («fingerprints») of the past 30 years agree

«The very low summer extent of Arctic sea ice that has been observed in recent years is often casually interpreted as an early - warning sign of anthropogenic global warming.

In this regard, I would observe that at least one important AGW effect, rising sea level, does not depend on a specific regional outcome so much as on global mean T. (At least, I think this is so (because my understanding is that most of the rise comes from lower density of warmer water, not from melting ice sheets — though again, not 100 % sure on this point)-RRB-.

The contribution from glaciers and ice caps (not including Greenland and Antarctica), on the other hand, is computed from a simple empirical formula linking global mean temperature to mass loss (equivalent to a rate of sea level rise), based on observed data from 1963 to 2003.

It may be worth considering that if climate models are underplaying the actual amount of Arctic sea ice loss, and if Arctic sea ice loss is a positive feedback on global temperature, then, the observed rate of Arctic sea ice loss ought to be applying a warming pressure over and above that from greenhouse gas emissions.

Global mean temperatures in 2011 did not reach the record - setting levels of 2010, but were still the highest observed in a La Niña year, and Arctic sea - ice extent fell to near - record - low levels.

We can also observe the effects of global warming in worldwide glacier retreat, declining Arctic ice sheets, sea level rise, warming oceans, ocean acidification, and increased intensity of weather events.

«It is very likely that the rate of global mean sea level rise during the 21st century will exceed the rate observed during 1971 — 2010 for all Representative Concentration Pathway (RCP) scenarios due to increases in ocean warming and loss of mass from glaciers and ice sheets.

Global sea ice (Arctic plus Antarctic) continues to track at record low levels in the satellite record, but the deviation from average has moderated compared to what was observed in November.

The researchers assert that the record - breaking sea ice loss from summer 2012, combined with the unusual atmospheric phenomena observed in late October, appear to be linked to global warming.

CAS = Commission for Atmospheric Sciences CMDP = Climate Metrics and Diagnostic Panel CMIP = Coupled Model Intercomparison Project DAOS = Working Group on Data Assimilation and Observing Systems GASS = Global Atmospheric System Studies panel GEWEX = Global Energy and Water Cycle Experiment GLASS = Global Land - Atmosphere System Studies panel GOV = Global Ocean Data Assimilation Experiment (GODAE) Ocean View JWGFVR = Joint Working Group on Forecast Verification Research MJO - TF = Madden - Julian Oscillation Task Force PDEF = Working Group on Predictability, Dynamics and Ensemble Forecasting PPP = Polar Prediction Project QPF = Quantitative precipitation forecast S2S = Subseasonal to Seasonal Prediction Project SPARC = Stratospheric Processes and their Role in Climate TC = Tropical cyclone WCRP = World Climate Research Programme WCRP Grand Science Challenges • Climate Extremes • Clouds, Circulation and Climate Sensitivity • Melting Ice and Global Consequences • Regional Sea - Ice Change and Coastal Impacts • Water Availability WCRP JSC = Joint Scientific Committee WGCM = Working Group on Coupled Modelling WGSIP = Working Group on Subseasonal to Interdecadal Prediction WWRP = World Weather Research Programme YOPP = Year of Polar Prediction

Mean sea level (MSL) evolution has a direct impact on coastal areas and is a crucial index of climate change since it reflects both the amount of heat added in the ocean and the mass loss due to land ice melt (e.g. IPCC, 2013; Dieng et al., 2017) Long - term and inter-annual variations of the sea level are observed at global and regional scales.

The second set of simulations, referred to as Tropical Ocean - Global Atmosphere (TOGA) experiments, are forced with observed SSTs for the 30 ° N — 30 ° S domain only, while SSTs and sea ice concentrations outside of the domain are set to climatology.

Observed hemispheric asymmetry in global sea ice changes.

October 2006: Reported on 2006 Arctic sea ice minimum and its global warming significance; collaborated on an analysis of the predicted and observed sea ice decline rates with J. Stroeve, W. Meier, M. Holland, and T. Scambos.

Dekker (Public), 4.60, (4.15 - 5.05 standard deviation range), Statistical Arctic sea ice decline has global implications for Northern Hemisphere weather patterns and Arctic eco systems and wild life alike, and thus it is concerning that our global climate models so far appear to underestimate the observed rate of decline based on albedo amplification of sea ice alone.

Integrate AON sea - ice measurements into global observational networks and data assimilation efforts through national and international mechanisms, e.g., SAON, CliC Arctic Sea Ice Working Group, an Arctic Observing Summsea - ice measurements into global observational networks and data assimilation efforts through national and international mechanisms, e.g., SAON, CliC Arctic Sea Ice Working Group, an Arctic Observing Summice measurements into global observational networks and data assimilation efforts through national and international mechanisms, e.g., SAON, CliC Arctic Sea Ice Working Group, an Arctic Observing SummSea Ice Working Group, an Arctic Observing SummIce Working Group, an Arctic Observing Summit.

There's no observed pause in sea - level rise; there's no observed pause in global energy imbalance, there's no observed pause in polar ice - mass loss.

As Media Matters has noted, the IPCC's 2007 «Synthesis Report» concluded that» [w] arming of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice and rising global average sea level» and that» [m] ost of the observed increase in global average temperatures since the mid-20th century is very likely [defined in the report as a» > 90 %» probability] due to the observed increase in anthropogenic [human - caused] GHG [greenhouse gas] concentrations.»

They also ran atmospheric models that used observed global sea surface temperatures, Arctic sea ice conditions and atmospheric carbon dioxide concentrations in 2010 to assess whether such factors might have contributed to the heat wave.

Global climate model projections for sea ice trends around Antarctica are at odds with what is being observed.

For example, while all of the global climate models participating in the most recent Intergovernmental Panel on Climate Change report show a decline in Arctic sea ice over the period of available observations, none of them match the severity of the trends we actually observe.

«Fs», the fixed SST forcing, is a combination of the flux change at the top of (and throughout) the atmosphere and of the global surface air temperature change after the forcing and with observed sea surface temperature (SST) and sea ice (SI) held fixed.