The tropics are a region of heat gain for the globe:
Tropical ocean sea surface temperatures influence atmospheric circulation, which redistributes heat and moisture from the tropics around the world.
Not exact matches
The finding surprised the University of Arizona - led research team, because the sparse instrumental records for
sea surface temperature for that part of the eastern
tropical Pacific
Ocean did not show warming.
The research, an analysis of
sea salt sodium levels in mountain ice cores, finds that warming
sea surface temperatures in the
tropical Pacific
Ocean have intensified the Aleutian Low pressure system that drives storm activity in the North Pacific.
Both the 2005 and 2010 droughts were the result of a «very, very unusual» weather pattern linked to higher
sea surface temperatures in the Atlantic
Ocean, said lead author Simon Lewis, a
tropical forests expert at the University of Leeds.
The new analysis combines
sea -
surface temperature records with meteorological station measurements and tests alternative choices for
ocean records, urban warming and
tropical and Arctic oscillations.
The underlying pattern in this year's fire forecast is driven by the fact that the western Amazon is more heavily influence by
sea surface temperatures in the
tropical Atlantic, and the eastern Amazon's fire severity risk correlates to
sea surface temperature changes in the
tropical Pacific
Ocean.
To develop the model, they compared historic fire data from NASA's Terra satellite with
sea surface temperature data in the
tropical Pacific and North Atlantic
oceans from buoys and satellite images compiled by the National Oceanic and Atmospheric Administration.
Sea surface temperatures in the
tropical Atlantic and
tropical Pacific
oceans three to six months before the peak of fire season are strongly correlated with total fire activity.
They found increases in
sea surface temperature and upper
ocean heat content made the
ocean more conducive to
tropical cyclone intensification, while enhanced convective instability made the atmosphere more favorable for the growth of these storms.
The most recent observations of
sea surface temperatures across the
tropical Pacific
Ocean (top) and how different those
temperatures are from normal (bottom).
During El Nino events the
ocean circulation changes in such a way as to cause a large and temporary positive
sea surface temperature anomaly in the
tropical Pacific.
A well - known issue with LGM proxies is that the most abundant type of proxy data, using the species composition of tiny marine organisms called foraminifera, probably underestimates
sea surface cooling over vast stretches of the
tropical oceans; other methods like alkenone and Mg / Ca ratios give colder
temperatures (but aren't all coherent either).
Cooler than normal
sea surface temperatures (blue shades) were developing in the
tropical Pacific
Ocean during October, signaling the possible development of La Nina.
The graph below shows the strong statistical relationship between annual CO2 rise and the strength of El Niño and La Niña, as quantified by
sea surface temperatures in the
tropical east Pacific
ocean.
Cooling
sea -
surface temperatures over the
tropical Pacific
Ocean — part of a natural warm and cold cycle — may explain why global average
temperatures have stabilized in recent years, even as greenhouse gas emissions have been warming the planet.
La Niña is the positive phase of the El Niño Southern Oscillation and is associated with cooler than average
sea surface temperatures in the central and eastern
tropical Pacific
Ocean.
A good explanation of the details is provided here: Koll & Abbot (2013)-- Why
Tropical Sea Surface Temperature is Insensitive to
Ocean Heat Transport Changes.
Subsequently, climate change has been greatly affected as Antarctic Intermediate Water have cooled and exerted a tremendous effect on
tropical sea surface temperatures for millions of years via «
ocean tunneling».
Location of the stations used for the Southern Oscillation Index (Tahiti and Darwin, black dots), the Equatorial Southern Oscillation Index (eastern equatorial Pacific and Indonesia regions, outlined in blue), and the Niño3.4 region in the east - central
tropical Pacific
Ocean for
sea surface temperature (red dashed line).
The evolution of El Niño - Southern Oscillation (ENSO) variability can be characterized by various
ocean - atmosphere feedbacks, for example, the influence of ENSO related
sea surface temperature (SST) variability on the low - level wind and
surface heat fluxes in the equatorial
tropical Pacific, which in turn affects the evolution of the SST.
Key factors expected to influence the regional climate during the OND 2016 season include the evolution of
Sea Surface Temperature (SST) anomalies over the
tropical Oceans.
Climate models surveyed by the Bureau of Meteorology have increased their chances of
sea surface temperatures in the
tropical Pacific
Ocean remaining at neutral levels, though still warmer than average, for the remainder of 2012.
By examining the spatial pattern of both types of climate variation, the scientists found that the anthropogenic global warming signal was relatively spatially uniform over the
tropical oceans and thus would not have a large effect on the atmospheric circulation, whereas the PDO shift in the 1990s consisted of warming in the
tropical west Pacific and cooling in the subtropical and east
tropical Pacific, which would enhance the existing
sea surface temperature difference and thus intensify the circulation.
«The authors write that «the notorious
tropical bias problem in climate simulations of global coupled general circulation models manifests itself particularly strongly in the
tropical Atlantic,»... they state that «the climate bias problem is still so severe that one of the most basic features of the equatorial Atlantic
Ocean — the eastward shoaling thermocline — can not be reproduced by most of the IPCC assessment report models,... as they describe it, «show that the bias in the eastern equatorial Atlantic has a major effect on
sea -
surface temperature (SST) response to a rapid change in the Atlantic Meridional Overturning Circulation (AMOC).»
The data indicate the
sea surface temperatures of the
tropical oceans warmed at a not - very - alarming rate of 0.11 deg C / decade, while the models indicate that, if the
surfaces of the
tropical oceans were warmed by manmade greenhouse gases, they should have warmed at almost 2 times that rate, at 0.22 deg C / decade.
It should come as no surprise that the models did overestimate the warming of the
sea surface temperatures of the
tropical oceans over the past 30 years.
The average
sea surface temperature for December to February was 0.84 C above the 20th century average of 15.8 C, with record highs for large swaths of the tropical Pacific Ocean (5), various regions of the North and South Atlantic, much of the Indian Ocean, and the Barents Sea in the Arctic (
sea surface temperature for December to February was 0.84 C above the 20th century average of 15.8 C, with record highs for large swaths of the
tropical Pacific
Ocean (5), various regions of the North and South Atlantic, much of the Indian
Ocean, and the Barents
Sea in the Arctic (
Sea in the Arctic (6).
This basin - wide change in the Atlantic climate (both warming and cooling) induces a basin - scale
sea surface temperature seesaw with the Pacific
Ocean, which in turn modifies the position of the Walker circulation (the language by which the
tropical basins communicate) and the strength of the Pacific trade winds.
It's a mode of natural variation in the
tropical eastern Pacific
ocean which is indicated by
sea surface temperature in that region, as well as patterns of atmospheric pressure,
surface winds over the
ocean, even precipitation over a much larger region.
The large interannual to decadal hydroclimatic variability in winter precipitation is highly influenced by
sea surface temperature (SST) anomalies in the
tropical Pacific
Ocean and associated changes in large - scale atmospheric circulation patterns [16].
The major climate system indices that are operationally used at ICPAC include evolution of monsoons, medium and upper level winds, Madden - Julian Oscillation (MJO), Quasi Biennial Oscillation (QBO), El Niño Southern Oscillation, Indian
Ocean dipole (IOD),
tropical cyclones,
sea surface temperature gradients among many others that have been derived from general circulation.
The results here reveal a larger picture — that the western
tropical Indian
Ocean has been warming for more than a century, at a rate faster than any other region of the
tropical oceans, and turns out to be the largest contributor to the overall trend in the global mean
sea surface temperature (SST)»
Warmer
sea surface water can severely damage coral reefs, facilitate algal blooms, and together with warmer air
temperature over the
oceans, can increase the destructive potential of
tropical cyclones and hurricanes.
Hurricanes form in warm
tropical waters, drawing strength from the heat of the
ocean surface — that's why they are expected to worsen as
sea surface temperatures increase.
The finding surprised the research team, because the sparse instrumental records for
sea surface temperature for that part of the eastern
tropical Pacific
Ocean did not show warming.
Towards the end of his presentation he added: «Some research suggests global warming is linked to rising
ocean and
sea surface temperatures in the
tropical Atlantic and the Gulf of Mexico — which may have an impact on hurricane intensity.
Record droughts in many areas of the world, the loss of arctic
sea ice — what you see is an increasing trend that is superimposed on annual variablity (no bets on what happens next year, but the five - to - ten year average in global
temperatures,
sea surface temperatures,
ocean heat content — those will increase — and ice sheet volumes,
tropical glacier volumes,
sea ice extent will decrease.
«High clouds over the western
tropical Pacific
Ocean seem to systematically decrease when
sea surface temperatures are higher,» says Arthur Y. Hou of Goddard's Data Assimilation Office.
Here we quantitatively relate the impacts of warm (and cold)
sea surface temperature anomalies in the eastern
tropical Pacific
Ocean to the number of hurricanes making landfall in the United States.
On June 1, the beginning of Atlantic Hurricane Season, the National Oceanic and Atmospheric Administration released a map of
sea surface temperatures in the Caribbean, the Gulf of Mexico, and the
tropical North Atlantic
Ocean.
Now, a team of climatologists, led by researchers at the University of California, Riverside, posits that the recent widening of the
tropical belt is primarily caused by multi-decadal
sea surface temperature variability in the Pacific
Ocean.
«Climatologists posit that the recent widening of the
tropical belt is primarily caused by multi-decadal
sea surface temperature variability in the Pacific
Ocean.
We reconstructed
sea surface temperature, El Niño — Southern Oscillation (ENSO) activity, and the
tropical Pacific zonal gradient for the past millennium from Galápagos
ocean sediments.