Improving projections for how
much ocean levels may change in the future and what that means for coastal communities has vexed researchers studying sea level rise for years, but a new international study that incorporates extreme events may have just given researchers and coastal planners what they need.
Not exact matches
And don't say something like, «The whales could just swim along side the ark» because that
much excess water (that supposedly flooded the earth) would have changed the salinity
levels in the
oceans.
The Christians say, «The whales could just swim along side the ark» but that
much excess water (that supposedly flooded the earth) would have changed the salinity
levels in the
oceans and the whales would have died.
The natural seeps of gas and oil could contribute to the overall
levels in the
ocean water, possibly complicating scientists» attempts to understand how
much oil spilled and what the effects will be on the gulf.
Scientists still do not know what triggers the breakup of an ice shelf or when future ones will occur, so they struggle to estimate how quickly glaciers will dump their ice into the
ocean and therefore how
much sea
level will rise.
It had
much higher sea
levels, forests extended all the way to the Arctic
Ocean, and there was almost certainly a lot less sea ice.
But it is unclear how
much residual radioactive contamination is still entering the sea from leaks around the Fukushima plant, says Scott Fowler, a marine ecologist at Stony Brook University in New York who has been involved in previous assessments of contamination
levels in the
ocean near Fukushima.
Only 30 percent of respondents answered the sea -
level question correctly; Greenland and Antarctic land ice have
much greater potential to raise sea
level than Arctic sea ice, which is already floating on the
ocean.
The West Antarctic ice sheet is a marine - based ice sheet that is mostly grounded below sea
level, which makes it
much more susceptible to changes in sea
level and variations in
ocean temperature.
Too
much debate treats temperature (and especially the most recent global average) as the sole indicator, whereas many other factors are at play including sea
levels,
ocean acidity, ice sheets, ecosystem trends, and many more.
Of course, that water does not truly disappear;
much of it ends up in the
ocean, where it makes up about one - fourth of the annual 3.1 - millimeter rise in sea
level.
The model also counters another argument against
oceans: that the proposed shorelines are very irregular, varying in height by as
much as a kilometer, when they should be
level, like shorelines on Earth.
American impact While global sea
levels have risen about 2.75 inches (7 centimeters) over the past 22 years, the west coast of the United States has not seen
much of a rise in
ocean levels.
There is no way to know that for sure, but the revised sea -
level numbers are consistent with the idea that the
oceans are absorbing
much of the lost heat in the past decade.
«If you look at Earth from space, the distribution of continents and
oceans will then look
much the same, even though life, the climate and sea
level may have dramatically changed.
Oceans, which have warmed at an increasingly faster rate, account for as
much as 50 percent of global sea
level rise, according to a new study.
Once complete, we should have a
much better idea of how and where ice -
ocean interactions are strongest, and what the implications will be for sea
level rise.
According to the study,
ocean warming now accounts for as
much as 50 percent of global sea
level rise.
The paper covers so
much — polar ice melt, sea
level, super storms,
ocean mixing.
The deposits were formed over hundreds of thousands of years in the past, when the sea
level was
much lower and areas now under the
ocean were exposed to rainfall which was absorbed into the underlying water table.
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When Sea
Levels Attack Few people ever realize how
much global warming will impact people across the globe, especially those living along the coast or on the islands scattered throughout the
oceans.
At Tamino's Open Mind, Doc Snow shared a photo link which may be relevant to this thread, since the reactor site seems to be pretty
much at sea
level, out into the
ocean (Pictures can be helpful):
For example:
much of the Antarctic ice sheet is grounded below sea
level, and some of the deepest parts are connected all the way to the open
ocean by ice grounded below sea
level.
That the heat absorption of the
ocean as a whole (at least to 2000 m) has not significantly slowed makes it clear that the reduced warming of the upper layer is not (at least not
much) due to decreasing heating from above, but rather mostly due to greater heat loss to lower down: through the 700 m
level, from the upper to the lower layer.
There's
much more to discuss about the significance of surface melting in relation to Greenland ice loss and — in the end — a rising contribution to the
oceans and sea -
level rise.
OCEANS RISING FAST, NEW STUDIES FIND Melting ice could raise
levels up to 3 feet by 2100, scientists say David Perlman, Chronicle Science Editor Friday, March 24, 2006 Glaciers and ice sheets on opposite ends of the Earth are melting faster than previously thought and could cause sea
levels around the world to rise as
much as three feet by the end of this century and 13 to 20 feet in coming centuries, scientists are reporting today.
With
ocean heat content, including the IPWP, running at record high
levels (literally off the chart), how
much energy is released in this El Niño and how quickly it fills back in is of keen interest to me.
The higher the sea
levels, the more damage most land - falling hurricanes will do with storm surge alone (unless it is in an
ocean area where sea
levels are not rising as
much as others).
These glaciers already contribute significantly to sea
level rise, releasing almost as
much ice into the
ocean annually as the entire Greenland Ice Sheet.
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.
I suspect any change in CO2 absorption will to too small to have
much affect on either
levels in the atmosphere or
ocean acidification, which may be why Rasmus did not mention it in his article.
Rather, excess CO2 returns toward baseline at a multitude a different rates, with chemical equilibration in the
ocean occurring over decades (depending on depth),
ocean carbonate buffering through sediment dissolution requiring centuries to millennia, and eventual restoration of carbonate sediment
levels by terrestrial weathering occurring over hundreds of thousands of years — a long «tail» that can account for as
much as 20 to 40 percent of CO2 excess in the estimates described by David Archer et al in CO2 Atmospheric Lifetimes.
For example: Sea
level and temperature, ice mass, hurricanes (typhoons) wind and rain, Polar ice mass, Ice extent, CO2 Concentration, read some
ocean buoys, read some tidal gauges, and
much more are acceptable from the several hundred meteorological satellites..
At least with a model like the MIT one used in Forest 2006 one can (if the descriptions of it are correct) set the key climate sensitivity, effective
ocean diffusivity and aerosol forcing
levels independently and with some confidence (I'm not the person to ask how
much) that the simulated results reflect those settings.
SLR already threatens several small island states in the Pacific and Indian
Oceans and, depending on how
much sea
level will rise in the coming decades and centuries, other coastal areas will become uninhabitable.
Reflecting the generally stormy pattern through the month, sea
level pressures were well below average (as
much as 10 hPa) over the central and eastern Arctic
Ocean.
One can logically wonder at just how
much Dr. Dorney knows if he begins his testimony with «Today the surface
ocean is almost 30 % more acidic than it was in pre-industrial times, and over the next few decades, the
level of acidity of the surface
ocean will continue to rise...» when the worries about acidic
oceans is pointless since where is the base line?
But during the «Hiatus» periods, the top of the
ocean doesn't accumulate nearly as
much heat whereas the next lower
levels accumulate more.
Since Trenbreth did not provide a mechanism for the heat to go from the atmosphere to the lower
levels of the
ocean, and since we are talking about the same amount of heat, that which would make the atmosphere not climb in temperature for 10 to 15 years, it is
much much more reasonable to assume the heat went from the surface of the
ocean to Trenbreth's depths (the
ocean simply overturned).
What is happening here is that the two (Hansen and Trenberth) whom you describe as «not, in fact, fanatics blinded by dogma» were surprised by the recent «lack of warming» (i.e. slight cooling) of the atmosphere as well as the upper
ocean, despite CO2 increase to record
levels, as this does not provide
much support for the premise that human CO2 is driving our climate.
This means, that «fresh» water is coming up from the lower layers constantly, and before the whole
ocean is adjusted to new CO2
levels, it takes
much longer time.
The first is climate inertia — on very many
levels, from fossil lock - in emissions (decades),
ocean - atmospheric temperature inertia (yet more decades), Earth system temperature inertia (centuries to millennia) to ecological climate impact inertia (impacts becoming worse over time under a constant stress)-- all this to illustrate anthropogenic climate change, although already manifesting itself, is still very
much an escalating problem for the future.