Sentences with phrase «temperatures over sea ice»

They applied a new method that fills in missing temperatures over sea ice by combining satellite data for missing areas with a method known as «kriging,» which calculates missing data by checking nearby temperature station readings.

And air temperatures over exposed land surfaces should warm differently than air temperatures over sea ice, especially when open ocean separates them.

I was very fortunate to be able to attend this meeting, and talking to the experts there was critical to understanding the behaviour of air temperatures over sea ice - this led to section 5 in the paper and our more recent update.

You almost assuredly saw at least one story about how the potent storm that triggered deadly tornado outbreaks and flooding across the South and Midwest in recent days carried so much warm air to the North Pole that temperatures over the sea ice, normally well below zero through the dark boreal winter, briefly hitting 33 degrees Fahrenheit today.

Also, the air temperature over sea ice question isn't closed.

b Trends surface temperature from the GOGA CAM3 simulations (background colorscale; air temperature over sea ice and SST elsewhere) along with the Z850 trend produced by the model simulations (black contours; negative dashed and positive solid; interval of 3 m / decade) and the simulated convective precipitation trends (positive green contours, negative red contours, contoured at − 0.7, − 0.3, − 0.1, 0.1, 0.3, and 0.7 mm / day / decade, shown only for 45 ° S — 45 ° N. (c) As in (b) but for the TOGA CAM3 simulations.

In both GOGA and TOGA simulations, the surface temperature over sea ice can respond to both prescribed sea ice and simulated atmospheric circulation changes, which explains differences with observations

Not exact matches

King penguins are in fact picky animals: in order to form a colony where they can mate, lay eggs and rear chicks over a year, they need tolerable temperature all year round, no winter sea ice around the island, and smooth beach of sand or pebbles.

El Niño thus leaves its mark on the Quelccaya ice cap as a chemical signature (especially in oxygen isotopes) indicating sea surface temperatures in the equatorial Pacific Ocean over much of the past 1,800 years.

Arctic sea ice melt fueled by ever - rising global temperatures is also opening the already fragile region to increased shipping traffic and may be affecting weather patterns over Europe, Asia and North America.

Note, the low Arctic sea - ice extent over the last summers are independent evidence of high Arctic temperatures.

Whilst it's natural to start with air temperatures, a more thorough examination should be as inclusive as possible; snow cover, ice melt, air temperatures over land and sea, even the sea temperatures themselves.

The Nature article comes as climate scientists published what they said today was the «best ever» collection of evidence for global warming, including temperature over land, at sea and in the higher atmosphere, along with records of humidity, sea - level rise, and melting ice.

The global mean temperature rise of less than 1 degree C in the past century does not seem like much, but it is associated with a winter temperature rise of 3 to 4 degrees C over most of the Arctic in the past 20 years, unprecedented loss of ice from all the tropical glaciers, a decrease of 15 to 20 % in late summer sea ice extent, rising sealevel, and a host of other measured signs of anomalous and rapid climate change.

Arctic and Antarctic Sea Ice Mayhem: AGU Mashup / / Published on Dec 24, 2017 Early snow retreat on the West Siberian Plains warms air temperatures, amplifying Rossby waves, causing a ridge and warming over Laptev Sea (thus rapid Arctic ice losIce Mayhem: AGU Mashup / / Published on Dec 24, 2017 Early snow retreat on the West Siberian Plains warms air temperatures, amplifying Rossby waves, causing a ridge and warming over Laptev Sea (thus rapid Arctic ice losice loss).

Other factors contributing to the recent regional rapid warming over the Antarctic Peninsula include decreased sea ice in the Bellingshausen Sea, resulting in warmer air temperatures, and decreasing precipitation over the south western peninsula [10, 1sea ice in the Bellingshausen Sea, resulting in warmer air temperatures, and decreasing precipitation over the south western peninsula [10, 1Sea, resulting in warmer air temperatures, and decreasing precipitation over the south western peninsula [10, 11].

Arctic sea ice extent continued a rapid retreat through the first two weeks of July as a high pressure cell moved over the central Arctic Ocean, bringing higher temperatures.

Note, the low Arctic sea - ice extent over the last summers are independent evidence of high Arctic temperatures.

Maue discussed how «two camps» of researchers claim to have increased predictability of such weather events over periods of a month or more by using clues either in the Arctic, related to the extent of sea ice and snow cover, or in the temperature of surface waters across the Pacific Ocean.

An apparent lag in temperature seen in the Greenland ice cores might be an artifact of the proximity of the large Laurentide Ice Sheet, which would have limited the near surface air temperature to the freezing point, as happens over summer sea - ice nice cores might be an artifact of the proximity of the large Laurentide Ice Sheet, which would have limited the near surface air temperature to the freezing point, as happens over summer sea - ice nIce Sheet, which would have limited the near surface air temperature to the freezing point, as happens over summer sea - ice nice now.

It's hard to imagine how Cowtan and Way could determine with any degree of certainty how «the hybrid method works best over land and most importantly sea ice» when there is so little surface air temperature data over sea ice.

Beck interpretes the latter as the direct influence of seawater temperatures, but the measurements near the floating ice border were just average, not the lowest... Modern measurements give less than 10 ppmv difference over the seas from the coldest oceans to the tropics, including a repeat of the trips that Buch made.

Comments Off on Histrionics over Arctic temperatures & sea ice extent: implications for polar bears

The 2009 State of the Climate Report of the US National Oceanic and Atmospheric Administration (NOAA) tells us that climate change is real because of rising surface air temperatures since 1880 over land and the ocean, ocean acidification, sea level rise, glaciers melting, rising specific humidity, ocean heat content increasing, sea ice retreating, glaciers diminishing, Northern Hemisphere snow cover decreasing, and so many other lines of evidence.

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.

TE, if the AMOC stops, their maps show that Atlantic temperature gradient is enhanced over what we have now, because the fresh cold meltwater and sea ice comes much further south and tightens the gradient.

The sea ice in the Siberian Arctic is peaking, its effect on the meridional temperature gradient strong, promoting increased zonal flow of large - scale winds, which advect warm air and moisture over the Eurasian continent from the Atlantic and disrupt vertical stratification near the surface and promote high cloudiness, both of which lead to increasing temperatures — greatest at low altitudes and high latitudes.

Over the Arctic Ocean and neighboring seas conventional temperature obser vations are often of uncertain quality, however, owing to logistical obstacles in making measurements over sea ice in harsh environmental conditiOver the Arctic Ocean and neighboring seas conventional temperature obser vations are often of uncertain quality, however, owing to logistical obstacles in making measurements over sea ice in harsh environmental conditiover sea ice in harsh environmental conditions.

They found a 60 - to 90 - year cycle in Barents and Greenland seas ice extent related to the Atlantic Multidecadal Oscillation (AMO); the AMO is a basin - wide cycle of sea surface temperature variability similar to the El Niño and La Niña cycles in the Pacific, but varying over much longer periods.

While a negative AO leads to warmer temperatures over the Arctic, it also tends to reduce the flow of sea ice out of the Arctic by affecting the winds that can export the ice to warmer waters, where it melts.

SHEBA observations of the evolution of temperature over the course of winter within the atmosphere (red), at the snow surface (black), at the top of the sea ice (green), and at the ocean surface beneath the sea ice (blue).

Over the sea ice field the observations include: sea ice freeboard height and hence sea ice thickness from radar altimetry; sea ice surface temperature and sea ice drift from respectively infrared radiometer and imaging spectrometer under cloud free conditions.

To name just a few of the climate impacts of the annular modes: the NAM is associated with large anomalies in surface temperatures and precipitation across North American and Eurasia, in the distribution of sea - ice throughout the Arctic, in sea - surface temperatures over the North Atlantic, and in the spatial distribution ozone in the lower stratosphere.

Both the observations of mass balance and the estimates based on temperature changes (Table 11.4) indicate a reduction of mass of glaciers and ice caps in the recent past, giving a contribution to global - average sea level of 0.2 to 0.4 mm / yr over the last hundred years.

In recent decades, much research on these topics has raised the questions of «tipping points» and «system flips,» where feedbacks in the system compound to rapidly cause massive reorganization of global climate over very short periods of time — a truncation or reorganization of the thermohaline circulation or of food web structures, for instance, caused by the loss of sea ice or warming ocean temperatures.

As evident in the figures the near surface air temperatures are actually warmer over the Arctic Ocean (by over 1 °C in large areas) when the sea ice absorbs solar radiation and transfers some of this energy as sensible heat back into the atmosphere.

From that link's words, the DMI «green line» IS the best way to consistently compare the daily estimate of NORTH areas of the arctic — those areas north of 70 latitude to 83 north latitude NASA - GISS extrapolates «surface» ground - based temperatures as far as 1200 km from where their land - based measurements were made from 60 - 70 latitude over the ever - greening (and darker) tundra and forests OUT to the open sea where where the arctic sea ice actually is present.

Pokrovsky predicts a further acceleration of melting of the thin ice and in general greater ice loss compared to his June prediction; this change is based on the increase in the sea surface temperature (SST) anomalies in the North Atlantic and the presence of hot air masses over Siberia and the Russian Arctic.

Currently when the sea ice area recovers quickly is simply apportioned to colder temperatures taking over.

If Arctic Sea ice recovers, ocean heat content declines, and near surface temperatures decline over a 10 year period... why then we might actually have something really worth getting excited about.

Sea surface temperatures (SSTs) in October were unusually high over the Chukchi and Beaufort Seas, as well as the Barents and Kara Seas along the Eurasian coast, helping to limit ice growth.

Many more flawed or misleading presentations of Global Warming science exist in the book, including those on Arctic sea ice thinning, correction of land - based temperature measurements for the urban heat island effect, satellite vs. ground - based measurements of Earth's warming, and controversies over sea level rise estimates.

This pattern combined with unusually high sea surface temperatures over the Barents and Kara Seas and helped to keep Arctic sea ice extent at low levels for November and December.

In a February 2015 blog post, the AEI's energy policy fellow Benjamin Zycher attempted to argue that concerns over sea level rise, global temperatures, floods, droughts and sea ice were overblown and that agreements to cut greenhouse gas emissions would be ineffective and too costly.

Actually Fielding's use of that graph is quite informative of how denialist arguments are framed — the selected bit of a selected graph (and don't mention the fastest warming region on the planet being left out of that data set), or the complete passing over of short term variability vs longer term trends, or the other measures and indicators of climate change from ocean heat content and sea levels to changes in ice sheets and minimum sea ice levels, or the passing over of issues like lag time between emissions and effects on temperatures... etc..

This makes sense to me, and may help explain why melting in the Arctic sea ice was nearly as great as last year's record, despite much lower Arctic temperatures (see below) over the last year.

In particular, initial stages of atmospheric model development often take place without coupling to an ocean model, running instead over observed sea surface temperatures (SSTs) and sea ice extent.

(2) the «Sea Surface» temperatures, which are averaged over the global ice - free oceans (60N to 60S), from the AMSR - E instrument on Aqua.

See also the Sea Surface Temperature Anomalies, Ice and Snow Cover, 1 year animation, from Environment Canada, for snow depth records over the last 365 days that include Hudson Bay.

(1) there is established scientific concern over warming of the climate system based upon evidence from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice, and rising global average sea level;