That is, Lin found that clouds in the tropics do change in
response to warmer sea surface temperatures, but that the cloud changes serve to slightly enhance warming at the surface.
Not exact matches
The
sea surface temperature
response to global
warming is a key question.
Much of Pres. Donald Trump's Mar - a-Lago country club in Palm Beach, Fla., sits less than two meters above the Atlantic Ocean, meaning big parts of the resort could rest beneath the waves by the end of this century as
seas rise in
response to global
warming.
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.
«This uncertainty is illustrated by Pollard et al. (2015), who found that addition of hydro - fracturing and cliff failure into their ice sheet model increased simulated
sea level rise from 2 m
to 17 m, in
response to only 2 °C ocean
warming and accelerated the time for substantial change from several centuries
to several decades.»
[
Response:
Sea ice is still not at levels seen during the Early Holocene, and since we are discussing sea floor sediments the main reason given to be concerned is that the change of summer sea ice will warm the bottom sea water, we are clearly not there y
Sea ice is still not at levels seen during the Early Holocene, and since we are discussing
sea floor sediments the main reason given to be concerned is that the change of summer sea ice will warm the bottom sea water, we are clearly not there y
sea floor sediments the main reason given
to be concerned is that the change of summer
sea ice will warm the bottom sea water, we are clearly not there y
sea ice will
warm the bottom
sea water, we are clearly not there y
sea water, we are clearly not there yet.
Zhang, J., M. Steele, and A. Schweiger (2010), Arctic
sea ice
response to atmospheric forcings with varying levels of anthropogenic
warming and climate variability, Geophys.
Polar amplication is of global concern due
to the potential effects of future
warming on ice sheet stability and, therefore, global
sea level (see Sections 5.6.1, 5.8.1 and Chapter 13) and carbon cycle feedbacks such as those linked with permafrost melting (see Chapter 6)... The magnitude of polar amplification depends on the relative strength and duration of different climate feedbacks, which determine the transient and equilibrium
response to external forcings.
Geoff Beacon, before betting too much check papers like Zhang et al. «Arctic
sea ice
response to atmospheric forcings with varying levels of anthropogenic
warming and climate variability».
«Yes,
sea ice seems
to behaving as the consensus of the climate models have been projecting — more rapid and larger
response in the northern high latitudes than anywhere else, flat
to possible increase in [southern hemisphere]
sea ice as
warming takes hold,» he wrote.
Those projections are detailed in Zhang et al, 2010 «Arctic
sea ice
response to atmospheric forcings with varying levels of anthropogenic
warming and climate variability.»
[
Response: Unfortunately, you seem
to have conveniently forgotten that Keigwin (and Pickart) published a paper in Science just a few years later in 1999 pointing that the appparent cooling (actually, the oxygen isotopic signal in question isn't entirely temperature, it is salinity as well, so the quantative 1 deg cooling estimate you cite is not actually reliable) in the Sargasso
Sea is diametrically opposed by a substantial
warming at the same time in the Laurentian Fan region of the North Atlantic off the coast of Newfoundland.
(57j) For surface + tropospheric
warming in general, there is (given a cold enough start) positive surface albedo feedback, that is concentrated at higher latitudes and in some seasons (though the temperature
response to reduced summer
sea ice cover tends
to be realized more in winter when there is more heat that must be released before ice forms).
While on the topic of the oceans»
response to warming, I would very much like
to see a RealClimate posting on the effects on
sea levels of GW.
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).
«Near - bottom water
warming in the Laptev
Sea in response to atmospheric and sea - ice conditions in 2007&raq
Sea in
response to atmospheric and
sea - ice conditions in 2007&raq
sea - ice conditions in 2007»
Overall, the panel's reports have never focused much on research examining how humans respond (or fail
to respond)
to certain kinds of risk, particularly «super wicked» problems such global
warming, which is imbued with persistent uncertainty on key points (the pace of
sea - level rise, the extent of
warming from a certain buildup of greenhouse gases), dispersed and delayed risks, and a variegated menu of possible
responses.
Suggested mechanisms range from upwelling of
warm deep waters onto the continental shelf in
response to variations in the westerly winds,
to an influence of El Niño — Southern Oscillation on
sea surface temperatures.
Underlying this entire context is the fact that we have not yet seen the equilibrium
response or Earth system
response from 350
to 400 ppm of CO2 — since the oceans are
warming and ice is melting and the
seas rising.
We know from satellite measurements that the Greenland and West Antarctic ice sheets (GIS and WAIS respectively) are losing mass in
response to global
warming, and that, in the case of the partly
sea - based West Antarctica ice - sheet, basal melting of the ice by
warmer ocean - water is likely
to be a key mechanism.
Consistent with the aforementioned
sea level rise acceleration, a number of articles have projected global
sea level rise of around 1m or more by 2100, based on past estimates of
sea level rise (in
response to warming) and based on melting of land ice (with thermal expansion):
During that same period, average annual rainfall in New South Wales declined by 3.6 inches (92 millimeters).3 Scientists think the decline in autumn rainfall in southeast Australia since the late 1950s may be partly due
to increases in heat - trapping gases in Earth's atmosphere.3, 14 Major bushfires over southeast Australia are linked
to the positive phase of an ocean cycle called the «Indian Ocean Dipole» — when
sea surface temperatures are
warmer than average in the western Indian Ocean, likely in
response to global
warming.15, 16
It is also worth noting that the use of both modes of Geo - E in a Troika strategy can not entirely guarantee a benign outcome, however long the R&D period, since we have no firm information on how large the
response the Methane Hydrates Melt feedback will be
to the sum of ocean
warming that is already penetrating the seabed plus that from the several decades of further
warming as the natural
sea temperatures are slowly restored.
How hurricanes develop also depends on how the local atmosphere responds
to changes in local
sea surface temperatures, and this atmospheric
response depends critically on the cause of the change.23, 24 For example, the atmosphere responds differently when local
sea surface temperatures increase due
to a local decrease of particulate pollution that allows more sunlight through
to warm the ocean, versus when
sea surface temperatures increase more uniformly around the world due
to increased amounts of human - caused heat - trapping gases.25, 26,27,28
Regardless of whether or not the oceans integrate ENSO and portray it in
sea surface temperature anomalies, the West Pacific and East Indian Oceans
warm in
response to both El Nino and La Nina events, so there is a cumulative
response to ENSO by a major portion of the global oceans.
AFAICT, models are in general underpredicting
sea level and ice sheet
response to the already observed
warming.
The long term
sea level
response after 2000 years is estimated as 1
to 3m per degree C of
warming.
How hurricanes develop also depends on how the local atmosphere responds
to changes in local
sea surface temperatures, and this atmospheric
response depends critically on the cause of the change.23, 24 For example, the atmosphere responds differently when local
sea surface temperatures increase due
to a local decrease of particulate pollution that allows more sunlight through
to warm the ocean, versus when
sea surface temperatures increase more uniformly around the world due
to increased amounts of human - caused heat - trapping gases.18, 25,26,27 So the link between hurricanes and ocean temperatures is complex.
Research revealed that in
response to the natural Arctic Oscillation, thick
sea ice had been blown into the
warmer Atlantic due
to a directional shift in freezing winds.
Local and large - scale atmospheric
responses to reduced Arctic
sea ice and ocean
warming in the WRF model
Rather, it both offers a tool for exploring the
sea level implications of polar ice sheets» complex physical
responses to global
warming and highlights the deep uncertainty that characterizes
sea level change in a high - emissions future.
There is new information that lack of
sea ice causes storms
to produce larger waves and more coastal erosion.5 An additional contributing factor is that coastal bluffs that were «cemented» by permafrost are beginning
to thaw in
response to warmer air and ocean waters, and are therefore more vulnerable
to erosion.22 Standard defensive adaptation strategies
to protect coastal communities from erosion such as use of rock walls, sandbags, and riprap have been largely unsuccessful.23 There remains considerable uncertainty, however, about the spatial patterns of future coastal erosion.
However,
sea - level fluctuations in
response to changing climate have been reconstructed for the past 22,000 years from fossil data, a period that covers the transition from the Last Glacial Maximum
to the
warm Holocene interglacial period.
As a result of the leftover
warm water, the
sea surface temperature anomalies of the Rest - of - the - World appear
to shift upwards in
response to the strong El Niño events:
While tweets using terms like «climate change» are more likely
to include language that garners a positive
response on the Hedonometer, like «
sea,» «oceans,» and «nature,» Twitter users who prefer
to tweet about «global
warming» are more likely
to use negative words such as «fraud,» «politicians,» and «blame» in their tweets as well.
In
response to the minimum (1.1 °C) and maximum (6.4 °C)
warming projected for AD 2100 by the IPCC models, our model predicts 7 and 82 cm of
sea - level rise by the end of the twenty - first century, respectively.
«The
response to a 1 °C
warming is consistently an increase [in Katrina - level storm surges] by a factor of 2 — 7... This increase does not include the additional increasing surge threat from
sea level rise»
Knowing that global atmospheric temperatures are a lagged
response to sea surface temperatures, characterized by the SOI, and that the SOI has moderated over the past decade, indicates that global
warming will moderate as well.
This work looked at climate model data
to confirm that
sea - surface temperature patterns can be used as an indicator of Amoc's strength and revealing that it has been weakening even more rapidly since 1950 in
response to recent global
warming.
It will be the impact of
sea level rise, as a consequence of global
warming driven by ever higher greenhouse gas levels in the atmosphere, in
response to the profligate global consumption of fossil fuels.
Click that and within the abstract:» The new cGPS stations will, in some cases, be co-located with existing tide gauges, thus supporting studies of
sea level change in
response to current global
warming».
In order of seniority, the seven feedbacks that seem outstanding are: Water vapour — rising by ~ 7 % per 1.0 C of
warming; Albedo loss — due mostly
to cryosphere decline; Microbial peat - bog decay — due
to rising CO2 affecting ecological dynamics; Desiccation of tropical and temperate soils — due
to SAT rise and droughts; Permafrost melt — due
to SAT rise plus loss of snow cover, etc; Forest combustion — due
to SAT rise, droughts, pest
responses, etc; Methyl clathrates [aka methane hydrates] now threatened by rising
sea - temperatures, increased water column mixing, etc..
Zhang, J.L., M. Steele, and A. Schweiger, «Arctic
sea ice
response to atmospheric forcings with varying levels of anthropogenic
warming and climate variability ``, Geophys.
We will be able
to give probabilistic estimates of the climate's transient sensitivity
to greenhouse gas increases and will have an improved understanding of the
response of
sea ice, precipitation, and temperature extremes
to warming.
Sea level is rising, primarily in
response to a
warming planet, through thermal expansion of the oceans, and also via the loss of land ice as ocean and air temperatures increase, melting ice and speeding the flow of non-floating ice
to form floating icebergs.
The largest unknown for future
sea level rise is caused by uncertainty in the predicted
response of the Antarctic ice sheet
to global
warming.
Tonyb, In
response to your first post I think you should be aware that Grindsted et al. 2010 addressed the
Sea Level Rise Issue for the Medieval Warm Period (MWP) and has shown that sea levels at the peak height of the MWP were 12 - 22 cm higher than tod
Sea Level Rise Issue for the Medieval
Warm Period (MWP) and has shown that
sea levels at the peak height of the MWP were 12 - 22 cm higher than tod
sea levels at the peak height of the MWP were 12 - 22 cm higher than today.
agreement that the
warming to date would have reduced Arctic
sea ice, there is no such consensus for the Antarctic, with at least some models having simulated
sea ice growth in
response to moderate
warming before switching
to sea ice shrinkage from additional
warming (e.g., Manabe et al., 1992; see also Liu and Curry, 2010).
Sea level rise is happening everywhere, as ice caps and glaciers melt and the
seas rise in
response to global
warming driven by prodigal human combustion of fossil fuels, and researchers have advanced from general warning
to the kind of detail that could help city and state planners prepare
to cope with flood risks.
First, it's noteworthy how opinion has solidified on the point that bleaching (corals expelling their associated symbiotic zooxanthellae) is a
response to higher temperature driven by general
warming of the
seas, rather than being due
to locally specific causes.