Sentences with phrase «sea ice extent before»

However, scientists have used historical records of sea ice conditions to estimate sea ice extent before 1979.

Late season melt or a shift in wind patterns could still decrease the sea ice extent before the winter freeze - up begins.

Not exact matches

An image of an area of the Arctic sea ice pack well north of Alaska, captured by the MODIS instrument on NASA's Aqua satellite on Sept. 13, 2013, the day before the National Snow and Ice Data Center estimated Arctic sea ice to have reached its minimum extent for the yeice pack well north of Alaska, captured by the MODIS instrument on NASA's Aqua satellite on Sept. 13, 2013, the day before the National Snow and Ice Data Center estimated Arctic sea ice to have reached its minimum extent for the yeIce Data Center estimated Arctic sea ice to have reached its minimum extent for the yeice to have reached its minimum extent for the year.

The extent of the ice in the Arctic has always been very uncertain but, through this work, we show how the sea ice in the Arctic Ocean developed before all the land - based ice masses in the Northern Hemisphere were established,» Jochen Knies explains.

I've noted his work before, but it never hurts to repeat that Andy Lee Robinson has been creating effective animated graphs of estimated sea ice volume (as distinct from area or extent) that provide a long view of shifting conditions.

[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).

What is more, in the dozen years before the survey, the sea ice extent in the Beaufort Sea, where the survey took place, had actually increased slightsea ice extent in the Beaufort Sea, where the survey took place, had actually increased slightSea, where the survey took place, had actually increased slightly.

For high GHG emissions such as those corresponding to RCP8.5, a nearly ice - free Arctic Ocean (sea ice extent less than 1 × 106 km2 for at least 5 consecutive years) in September is likely before mid-century (medium confidence).

Before the satellite era there were records of Arctic temperature trends and sea ice extent.

So, it is quite likely that in the decades immediately before the satellite records began, average Arctic sea ice extent was actually increasing, but we just weren't monitoring it.

Before September even began, Arctic sea ice extent reached record low levels.

Nearly all studies to date published in the peer - reviewed literature agree that summer Arctic sea ice extent is rapidly declining and that, if heat - trapping gas concentrations continue to rise, an essentially ice - free summer Arctic ocean will be realized before mid-century.

The extent of the ice in the Arctic has always been very uncertain but, through this work, we show how the sea ice in the Arctic Ocean developed before all the land - based ice masses in the Northern Hemisphere were established,» Jochen Knies explains.

Bosse (Citizen Scientist / Public), 4.1 (± 0.43), Statistical (Same as June) Just as in the two years before I calculate the value for the September - minimum of the arctic sea ice extent of the year n (NSIDC monthly mean for September) from the Ocean Heat Content (0... 700m depth) northward 65 ° N during JJAS of the year n - 1.

The increase in Antarctic sea ice extent has been discussed numerous times before in this group.

QUOTE: The increase in Antarctic sea ice extent has been discussed numerous times before in this group.

Arctic sea ice melted to a lesser extent than in 2012, although the total sea ice extent was still lower than in any year before 2007.

Intervals of sustained low extent of sea ice cover occurred before AD 1200, and may be coincident with the so - called Medieval Warm Optimum (roughly AD 800 — 1300) attested in numerous Northern Hemisphere proxy records18, but the pre-industrial minimum occurred before, at about AD 640 (T3 in Fig. 3).

I did notice in the graphs that a dramatic drop in sea ice extent is predicted (by CCSM3) to occur around 2030, only to be followed by a «recovery» which lasts about 5 - years or so, before the decline sets in again.

I think the claim that there are no reliable sea ice extent data before 1978 is a lie.

Right now it seems that: It's more likely that Summer Arctic Sea Ice extent will disappear before 2025 It's more likely that 2 C will occur nearer to 2033 than 2040 It's more likely that 4 C will occur closer to 2050 than 2100 It's more likely that more people will die from heat stress, disease, or severe clean water and food shortages than extreme weather events.

There continues to be a consensus for continued anomalously low sea ice extent similar to the values for 2008 - 2010 and below all previous values before 2007.