Sentences with phrase «existing ice data»

Does this mean that the predictions of Antarctic ice melting derive from future projections of global temperature increase, and not from existing ice data?

Not exact matches

Combining the existing ISO, Spitzer, VLT and Keck ice data results in a large sample of ice sources (\ sime80) that span all stages of star formation and a large range of protostellar luminosities (< 0.1 - 105 L \ odot).

We know from data that we have caused the CO2 concentration in the atmosphere to rise sharply during the past century: it is now much higher than any time during the past 650,000 years (which is as far back as reliable ice core data exist).

We need further field data from key areas of East Antarctica to reject some of the ice model scenarios — although there are fewer rock outcrops to sample geologically and geodetically in this region there are still large regions where outcrops exist but no, or few, data have been collected and / or results have been published.

GISS also masks sea surface temperature wherever sea ice has existed so there is little data in the Arctic Ocean.

[17] Before the advent of satellite - based imagery in 1973, sea ice concentration data for the Antarctic are not available, and sea ice extent data are not readily available for indi - vidual months, seasons or years, although some visible and infrared data do exist for 1966 — 1972 [Zwally et al., 1983] and some undigitized charts reside in national archives (e.g., V. Smolyanitsky, personal communication, 2002).

A wealth of historical imagery exists for Greenland, and scientists could use this data to develop even more detailed histories of the ice sheet, and to determine whether the Greenland Ice Sheet was at equilibrium — not losing or gaining mass — in recent timice sheet, and to determine whether the Greenland Ice Sheet was at equilibrium — not losing or gaining mass — in recent timIce Sheet was at equilibrium — not losing or gaining mass — in recent times.

Including open - water phytoplankton biomarkers as well as micropaleontological data, we demonstrate (1) that a permanent sea ice cover existed during MIS 6 and (2) that during the LIG sea ice was still present in the central Arctic Ocean during the spring / summer season even under (global) boundary conditions significantly warmer than the present.

Our proxy reconstruction of the last interglacial sea ice cover is supported by climate simulations, although some proxy data / model inconsistencies still exist.

For instance the Vostok ice - core data over 415,000 years has an average measurement - spacing of 756 years, meaning that the likelihood of measuring an increase in atmospheric CO2 as the one measured at Mauna Loa over the last 50 years, if one existed in the Vostok ice - core samples, amounts to 6.6 % (i.e. 50/756).

• Expand our existing Unified Sea Ice Thickness Climate Data Record (Sea Ice CDR) to include ICESat, IceBridge, and CryoSat - 2 estimates of the ice thickneIce Thickness Climate Data Record (Sea Ice CDR) to include ICESat, IceBridge, and CryoSat - 2 estimates of the ice thickneIce CDR) to include ICESat, IceBridge, and CryoSat - 2 estimates of the ice thickneice thickness.

Ice - ocean model simulations, on the other hand, have requirements with respect to data density and quality, e.g., for observed ice thickness fields used in initialization of model runs, that are currently not being met by existing data sources (with the exception of, e.g., satellite - observed ice concentration fieldIce - ocean model simulations, on the other hand, have requirements with respect to data density and quality, e.g., for observed ice thickness fields used in initialization of model runs, that are currently not being met by existing data sources (with the exception of, e.g., satellite - observed ice concentration fieldice thickness fields used in initialization of model runs, that are currently not being met by existing data sources (with the exception of, e.g., satellite - observed ice concentration fieldice concentration fields).

It seems reasonable to me that some of this data may not exist since the ice was melting or sublimating because of high temperatures at the poles.

Snow depth over sea ice data You might be surprised to find out how few data on snow depth over sea ice exists (i.e., actual observations or measurements), apart from measurements that ringed seal researchers have collected.

The very limited data that exist have shown that the Antarctic has been cooling ever so slightly most recently, which probably also has something to do with the slightly increasing sea ice there.

Notice that the stomata record is invariably higher than the ice core record, where both sets of data exist.

Direct data does not exist for periods earlier than those represented in the ice core record, a record that indicates CO2 mole fractions stayed within a range of 180 ppm to 280 ppm throughout the last 800,000 years, until the increase of the last 250 years.

Passive microwave data may show ice where none actually exists due to signal variation between land and water along coastlines, or because of atmospheric interference from rain or high winds over the ice - free ocean.

1930's arctic temperature data doesn't seem so far from the present phase but reconstructions that exist have the ice conditions very different.