A new scientific paper tracks these changes and suggests that
warm ocean conditions similar to what we see off Southern California today fueled that 2,000 - year stretch of droughts.
Mengel said some simulations produced
the warm ocean conditions needed to remove the ice cork within the next 200 years, but It would take around 2,000 years to raise global sea levels by one metre.
While El Niño has brought coral - killing hot water to the Galápagos on a periodic basis for millennia, new research suggests that the frequency and intensity of
warm ocean conditions may be increasing (Hughes et al. 2018).
Mengel said some simulations produced
the warm ocean conditions needed to remove the ice cork within the next 200 years, but It would take around 2,000 years to raise global sea levels by one meter (3.3 feet).
A study led by researchers at the University of Washington and the National Oceanic and Atmospheric Administration connects the unprecedented West Coast toxic algal bloom of 2015 that closed fisheries from southern California to northern British Columbia to the unusually
warm ocean conditions — nicknamed «the blob» — in winter and spring of that year.
«Changes in spawning timing and poleward migration of fish populations due to
warmer ocean conditions or global climate change will negatively affect areas that were historically dependent on these fish, and change the food web structure of the areas that the fish move into with unforeseen consequences,» researchers wrote.
He said he does think, however, that there will a broader shift to
warmer ocean conditions that will last for several years and that means that global temperatures will hover around the level they have recently reached before moving upward again, like stairs on a staircase.
Not exact matches
One explanation for why the season is so active is that all of the components that make hurricanes are near ideal
conditions: The
ocean waters are at their
warmest they get all year (and are somewhat hotter than usual).
Conditions are otherwise favorable for intensification through Sunday, with a moist atmosphere, light wind shear less than 10 knots, and very
warm ocean waters near 30 °C (86 °F).
Using these data, researchers fine - tuned estimates from previous foram studies that captured polar
conditions to show tropical
oceans warmed substantially in the Eocene, but not as much as polar
oceans.
Co-author Hayley Hung, a scientist with Environment Canada's Air Quality Division who studies toxic organic pollutants in the Arctic, said that in recent years, researchers had posited that
warmer conditions would liberate POPs stored in land, ice and
ocean reservoirs back into the atmosphere.
The additional
warming caused a near - doubling of melt rates in the twenty - year period from 1995 to 2015 compared to previous times when the same blocking and
ocean conditions were present.
While natural patterns of certain atmospheric and
ocean conditions are already known to influence Greenland melt, the study highlights the importance of a long - term
warming trend to account for the unprecedented west Greenland melt rates in recent years.
«Since no organisms living in the
ocean today would have time to adapt to these
warmer conditions, many will either go extinct or migrate away from the western Pacific, leaving this area with much lower biodiversity.»
«Over several hundred generations, apparently those new mutations that are advantageous in
conditions of both
ocean acidification and
warming emerged and swept through the population,» concludes Schlüter.
Models used to project
conditions on an Earth
warmed by climate change especially need to consider how the
ocean will move excess heat around, Legg said.
These findings from University of Melbourne Scientists at the ARC Centre of Excellence for Climate System Science, reported in Nature Climate Change, are the result of research looking at how Australian extremes in heat, drought, precipitation and
ocean warming will change in a world 1.5 °C and 2 °C
warmer than pre-industrial
conditions.
It is possible, he adds, that these persistent high - pressure zones may be produced by two well - known oceanographic patterns: La Nina and El Nino in the Pacific
Ocean (which mark alterations in warmer and cooler conditions between that ocean's eastern and western equatorial waters) and the North Atlantic Oscillation (which results from weather patterns between Iceland and the Azo
Ocean (which mark alterations in
warmer and cooler
conditions between that
ocean's eastern and western equatorial waters) and the North Atlantic Oscillation (which results from weather patterns between Iceland and the Azo
ocean's eastern and western equatorial waters) and the North Atlantic Oscillation (which results from weather patterns between Iceland and the Azores).
The consequences of global
warming may be lower food production,
ocean acidification, loss of biodiversity, worse weather
conditions and poor access to fresh water.
The rapid northerly shifts in spawning may offer a preview of future
conditions if
ocean warming continues, according to the new study published in Global Change Biology by scientists from the Pacific States Marine Fisheries Commission, Oregon State University and NOAA Fisheries» Northwest Fisheries Science Center.
Year - round ice - free
conditions across the surface of the Arctic
Ocean could explain why Earth was substantially
warmer during the Pliocene Epoch than it is today, despite similar concentrations of carbon dioxide in the atmosphere.
Under normal
conditions, the trade winds and
ocean currents in the tropical Pacific travel from the Americas to Asia, maintaining a pool of very
warm water and a related area of intense tropical rainfall around Indonesia.
Year - round ice - free
conditions across the surface of the Arctic
Ocean could explain why Earth was substantially
warmer during the Pliocene Epoch than it is today, despite similar concentrations of carbon dioxide in the atmosphere, according to new research carried out at the University of Colorado Boulder.
His research with Qinghua Ding, a UW research associate, showed that the majority of Antarctic
warming came during the 1990s in response to El Niño
conditions in the tropical Pacific
Ocean.
The observed increase in freshwater content will affect the
conditions in all Greenland fjords and may ultimately affect the global
ocean currents that keep Europe
warm.
Scientists anticipate that future
oceans will be slightly
warmer and contains less oxygen (a
condition known as hypoxia).
The one - two punch of
warming waters and
ocean acidification is predisposing some marine animals to dissolving quickly under
conditions already occurring off the Northern California coast, according to a study from the University of California, Davis.
The El Nino weather pattern is a
warming of
ocean surface temperatures in the eastern and central Pacific and usually brings hot, dry, and often drought
conditions to Australia.
The science team obtained vital information about the physical characteristics within one large
warm - water eddy, which likely originated from the North Brazil Current, and analyzed its potential influence on sub-surface
ocean conditions during the passage of tropical cyclones.
For example, contrary to their assertion, current
conditions in the eastern Pacific are almost the antithesis of projected
conditions for most reef systems under global
warming and
ocean acidification.
El Niño
conditions can also curb the formation of powerful storms, and with no El Niño in the picture in 2017 — and with
warmer - than - average
ocean waters — last year's Atlantic hurricane season was unusually active.
Along one string of sites, or «stations,» that stretches from Antarctica to the southern Indian
Ocean, researchers have tracked the conditions of AABW — a layer of profoundly cold water less than 0 °C (it stays liquid because of its salt content, or salinity) that moves through the abyssal ocean, mixing with warmer waters as it circulates around the globe in the Southern Ocean and northward into all three of the major ocean ba
Ocean, researchers have tracked the
conditions of AABW — a layer of profoundly cold water less than 0 °C (it stays liquid because of its salt content, or salinity) that moves through the abyssal
ocean, mixing with warmer waters as it circulates around the globe in the Southern Ocean and northward into all three of the major ocean ba
ocean, mixing with
warmer waters as it circulates around the globe in the Southern
Ocean and northward into all three of the major ocean ba
Ocean and northward into all three of the major
ocean ba
ocean basins.
For example, scientists have found that El Niño and La Niña, the periodic
warming and cooling of surface waters in the central and eastern tropical Pacific
Ocean, are correlated with a higher probability of wet or dry
conditions in different regions around the globe.
Sea surface temperatures in the Pacific
Ocean are
warmer than normal — El Niño
conditions — which suppress rainfall in the eastern Amazon.
A study examined three different factors:
warmer - than - usual surface atmosphere
conditions (related to global
warming); sea - ice thinning prior to the melting season (also related to global
warming); and an August storm that passed over the Arctic, stirring up the
ocean, fracturing the sea ice and sending it southward to
warmer climes.
Other droughts that struck the U.S. also correspond to cooler tropical Pacific temperatures, the researchers report, but only the so - called Dust Bowl drought combined these
condition with a
warmer Atlantic
Ocean.
«Changes in
ocean conditions that affect fish stocks, such as temperature and oxygen concentration, are strongly related to atmospheric
warming and carbon emissions,» said author Thomas Frölicher, principal investigator at the Nippon Foundation - Nereus Program and senior scientist at ETH Zürich.
After cooling briefly in July,
ocean temperatures in the Niño 3.4 region — the area where ENSO
conditions are monitored — began
warming once again.
With ENSO - neutral
conditions present during the first half of 2013, the January — June global temperature across land and
ocean surfaces tied with 2003 as the seventh
warmest such period, at 0.59 °C (1.06 °F) above the 20th century average.
With the sun continuing to heat the
ocean water at the tropical latitudes regardless of ice cap
conditions up north, it would seem that the presence of an ice cap would result in a
warmer ocean over the long term, with the converse also being true.
I'd love to know what they did take into account in attempting to model that period — must include astronomical location, sun's behavior, best estimates about a lot of different
conditions — where the continents were, what the
ocean circulation was doing, whether there had been a recent geological period that laid down a lot of methane hydrates available to be tipped by Pliocene
warming into bubbling out rapidly.
Bacteria, however, have remained Earth's most successful form of life — found miles deep below as well as within and on surface rock, within and beneath the
oceans and polar ice, floating in the air, and within as well as on Homo sapiens sapiens; and some Arctic thermophiles apparently even have life - cycle hibernation periods of up to a 100 million years while waiting for
warmer conditions underneath increasing layers of sea sediments (Lewis Dartnell, New Scientist, September 20, 2010; and Hubert et al, 2010).
The open
ocean around the atoll was 2 degrees Celsius
warmer than usual, but a short - term change in weather
conditions pushed temperatures on top of the reef to 6 degrees Celsius above normal.
During normal
conditions, trade winds blow to the west across the tropical Pacific
Ocean, piling up
warm surface water in the western Pacific, and cold, deeper water rises up, or upwells, off the west coast of South America.
Scientists compare primitive Earth scenario with satellite Europa's
conditions; the jupiterian moon could host microorganisms at the bottom of a huge
warm ocean located underneath its frozen crust.
«The surge in global temperatures since 1977 can be attributed to a 1976 climate shift in the Pacific
Ocean that made
warming El Niño
conditions more likely than they were over the previous 30 years and cooling La Niña
conditions less likely» says corresponding author de Freitas.
The accessibility of a large numbers of tidewater glaciers, subject to
warming conditions, provides a unique opportunity to observe processes and enable more accurate predictions of sea level response to
ocean warming around Antarctica.
In the paper Gray makes many extravagant claims about how supposed changes in the THC accounted for various 20th century climate changes («I judge our present global
ocean circulation
conditions to be similar to that of the period of the early 1940s when the globe had shown great
warming since 1910, and there was concern as to whether this 1910 - 1940 global
warming would continue.
Other hurricane - friendly climate factors this year include ENSO - neutral
conditions (no El Niño or La Niña) in the Pacific
Ocean,
warmer than average waters in the tropical Atlantic, and a stronger - than - average West African monsoon.
Figure 3 - Schematic showing the upper
ocean temperature profiles during the (A) nighttime or well mixed daytime and (B) daytime during
conditions conducive to the formation of a diurnal
warm layer.