El Niño is the name assigned when shifting trade winds over the Pacific Ocean give rise to
warmer water temperatures further east, fomenting stormy conditions in parts of the Americas and concomitant droughts in parts of Asia and Australia.
Not exact matches
Their results suggest a drop of as much as 10 degrees for fresh
water during the
warm season and 6 degrees for the atmosphere in the North Atlantic, giving
further evidence that the concentration of atmospheric carbon dioxide and Earth's surface
temperature are inextricably linked.
The north - south gradient of increasing glacier retreat was found to show a strong pattern with ocean
temperatures, whereby
water is cold in the north - west, and becomes progressively
warmer at depths below 100m
further south.
South of Spitzbergen, the oceans have been ice free the past 2 winters, reason being, the
warm waters from the Gulf Stream are travelling
further north, and closer to the ocean surface, only 25 meters at the last measurement, The ocean
temperature has been +2 C instead of -2 C.
And that additional
water vapour would in turn cause
further warming - this being a positive feedback, in which carbon dioxide acts as a direct regulator of
temperature, and is then joined in that role by more
water vapour as
temperatures increase.
Re 9 wili — I know of a paper suggesting, as I recall, that enhanced «backradiation» (downward radiation reaching the surface emitted by the air / clouds) contributed more to Arctic amplification specifically in the cold part of the year (just to be clear, backradiation should generally increase with any
warming (aside from greenhouse feedbacks) and more so with a
warming due to an increase in the greenhouse effect (including feedbacks like
water vapor and, if positive, clouds, though regional changes in
water vapor and clouds can go against the global trend); otherwise it was always my understanding that the albedo feedback was key (while sea ice decreases so
far have been more a summer phenomenon (when it would be
warmer to begin with), the heat capacity of the sea prevents much
temperature response, but there is a greater build up of heat from the albedo feedback, and this is released in the cold part of the year when ice forms later or would have formed or would have been thicker; the seasonal effect of reduced winter snow cover decreasing at those latitudes which still recieve sunlight in the winter would not be so delayed).
•
Water vapor in the troposphere increases with
warming and in turn «absorbs more heat and
further raises the Earth's
temperature,» McPherson reports.
Position on a Continent
Temperature Precipitation Distribution of Climate Regions - Due to
water's better ability to hold heat longer, areas around coastlines tend to have
warmer climates than areas that are
further away from
water.
But how the West Antarctic and Greenland ice sheets respond to
warmer temperatures is the biggest unknown by
far in trying to predict how fast the
waters will rise over the coming century and beyond.
Although the pathogen is normally found in
warm ocean
water, it is becoming increasingly common
farther north as ocean
temperatures rise.
El Ni o an irregular variation of ocean current that, from January to February, flows off the west coast of South America, carrying
warm, low - salinity, nutrient - poor
water to the south; does not usually extend
farther than a few degrees south of the Equator, but occasionally it does penetrate beyond 12 S, displacing the relatively cold Peruvian current; usually short - lived effects, but sometimes last more than a year, raising sea - surface
temperatures along the coast of Peru and in the equatorial eastern Pacific Ocean, having disastrous effects on marine life and fishing
There has been an overall
warming of surface
waters (in the Bellingshausen and Scotia seas) by ∼ 1 °C in the last 50 years, but so
far there is no evidence of any biologically meaningful
temperature change in
waters below about 100 m deep.
We do not need models to anticipate that significant rises in atmospheric CO2 concentrations harbor the potential to raise
temperatures significantly (Fourier, 1824, Arrhenius, 1896), nor that the
warming will cause more
water to evaporate (confirmed by satellite data), nor that the additional
water will
further warm the climate, nor that this effect will be partially offset by latent heat release in the troposphere (the «lapse - rate feedback»), nor that greenhouse gas increases will
warm the troposphere but cool the stratosphere, while increases in solar intensity will
warm both — one can go on and on
«The dramatic changes in lake ice may also contribute to
further warming of the entire region, because open
water on lakes contributes to
warmer air
temperatures, albeit to a lesser extent than open seawater,» Surdu said.
The best way to envision the relation between ENSO and precipitation over East Africa is to regard the Indian Ocean as a mirror of the Pacific Ocean sea surface
temperature anomalies [much like the Western Hemisphere
Warm Pool creates such a SST mirror with the Atlantic Ocean too]: during a La Niña episode,
waters in the eastern Pacific are relatively cool as strong trade winds blow the tropically Sun -
warmed waters far towards the west.
The theory is that increasing CO2 will cause a small bit of
warming and this will increase evaporation rates (which occur fastest in the tropics) and dumps more
water vapour in the atmosphere (
water vapour is by
far a more potent greenhouse gas than CO2) and this feedback amplification is meant to continue until Earth settles down and finds a new equilibrium
temperature.
With a heat capacity for the total atmosphere equal to ~ 3 meter of
water and an average
temperature far below the average surface
temperature there is no way you can
warm Earth's surface and oceans from the atmosphere.
Satellite pictures (below) clearly show that the recent loss of winter Arctic ice has occurred along the pathway by which
warmer waters enter the Barents Sea, deep inside the Arctic Circle, while simultaneously air
temperatures far to the south remain cold enough to maintain a frozen Hudson Bay.
This makes it clear to what extent the variability in the inflow of «
warm and salty» North Atlantic
water at times of positive values of the NAO (North Atlantic Oscillation) dominates the
temperature of the Atlantic
water mass by importing «vast quantities of heat» into the Arctic Ocean to induce core
temperatures in the intermediate layer in Nansen Basin that are much
warmer than in the Canadian Basin,
far downstream.
All that is needed is to add heat carried upwards past the denser atmosphere (and most CO2) by convection and the latent heat from
water changing state (the majority of heat transport to the tropopause), the albedo effects of clouds, the inability of long wave «downwelling» (the blue balls) to
warm water that makes up 2 / 3rds of the Earth's surface, and that due to huge differences in enthalpy dry air takes
far less energy to
warm than humid air so
temperature is not a measure of atmospheric heat content.
Warmer temperatures can directly increase evaporation rates, and also affect the
water vapour transport within soils themselves,
further adding to the evaporative demand.
Since
water vapor is the most important greenhouse gas, the growth in its concentration caused by atmospheric
warming exerts an additional forcing, causing
temperature to rise
further.
And that additional
water vapour would in turn cause
further warming - this being a positive feedback, in which carbon dioxide acts as a direct regulator of
temperature, and is then joined in that role by more
water vapour as
temperatures increase.
The IPCC has already concluded that it is «virtually certain that human influence has
warmed the global climate system» and that it is «extremely likely that more than half of the observed increase in global average surface
temperature from 1951 to 2010» is anthropogenic.1 Its new report outlines the future threats of
further global
warming: increased scarcity of food and fresh
water; extreme weather events; rise in sea level; loss of biodiversity; areas becoming uninhabitable; and mass human migration, conflict and violence.
The treated fabric is much more hydrophilic than the fabric by itself (which only absorbs about 18 % of its own weight), and yet when the
temperature gets
warmer, the fabric becomes hydrophobic and releases all of the absorbed
water (as pure
water) without any other
further action.