For the period 1993 to 2003, the Levitus et al. (2005a) analysis has a linear global
ocean trend of 0.42 ± 0.18 W m — 2, Willis et al. (2004) has a trend of 0.66 ± 0.18 W m — 2 and Ishii et al. (2006) a trend of 0.33 ± 0.18 W m — 2.
(How about deep
ocean trends of thousands of years?
Not exact matches
The two «horizon'
trends I, as well as the Mintel Global Packaging Team see, are the challenges
of ocean plastics and e-commerce packaging.
The market researcher also notes «
Ocean Garden» as one
of its 2018
trends, where the industry is looking towards the sea as a source for ingredients and more holistic nutrition inspiration.
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.
The pattern isn't as evident in the northern Atlantic
Ocean as it is in the southern Indian
Ocean and the southern Pacific
Ocean, but if the
trend continues, it means more intense hurricanes in places
of greater population.
Several studies linked this to changes in sea surface temperatures in the western Pacific and Indian
Oceans, but it was not clear if this was part
of a long - term
trend.
The scientists, led by Eric Oliver
of Dalhousie University in Canada, investigated long - term heat wave
trends using a combination
of satellite data collected since the 1980s and direct
ocean temperature measurements collected throughout the 21st century to construct a nearly 100 - year record
of marine heat wave frequency and duration around the world.
Although the impact
of SAM events over the short term was an interesting finding, it was the long - term
trend over multiple decades
of observations that gave a crucial indication
of the changes occurring in the Southern
Ocean.
Sea - level rise and coral bleaching often dominate discussions about how climate change affects the
ocean, but a host
of more subtle — and harder to research —
trends also play a role in reshaping the world's marine ecosystems.
«We can't do much to quickly reverse the
trends of ocean warming or
ocean acidification, which are both real threats that must be addressed.
A new study, the most comprehensive ever on seasonal distribution patterns and historic
trends in abundance
of white sharks (Carcharodon carcharias) in the western North Atlantic
Ocean, used records compiled over more than 200 years to update knowledge and fill in gaps in information about this species.
«These results help resolve a divergence in climate
trends of the past 2,000 years recorded in marine sediments
of the North Atlantic
Ocean, compared with those recorded in fossil pollen from the continents
of North America and Europe,» says Jonathan Wynn, program director in NSF's Division
of Earth Sciences, which co-funded a portion
of the research with NSF's Division
of Environmental Biology.
Climate modeling shows that the
trends of warming
ocean temperatures, stronger winds and increasingly strong upwelling events are expected to continue in the coming years as carbon dioxide concentrations in the atmosphere increase.
The results suggest that the impact
of sea ice seems critical for the Arctic surface temperature changes, but the temperature
trend elsewhere seems rather due mainly to changes in
ocean surface temperatures and atmospheric variability.
Given the obvious concerns for human ecological health — in terms
of climate change, heavy metal toxification, indoor air quality, air pollution, plastics in the
oceans, and things like that — there will be a large - scale
trend to buildings that start to act like organisms.
The
trends revealed by the data were clear: The average albedo in the northern area
of the Arctic
Ocean, including open water and sea ice, is declining in all summer months (May - August).
Suomi NPP's job is to collect environmental observations
of atmosphere,
ocean and land for both NOAA's weather and oceanography operational missions and NASA's research mission to continue the long - term climate record to better understand Earth's climate and long - term
trends.
«A fundamental question has been whether we can directly link expansion
of harmful algal blooms to a warming
ocean; this paper provides critical, quantitative evidence for just that trend, confirming an expected, but difficult to test, direct link between toxic blooms to climate,» said Dr. Raphael Kudela, Professor of Ocean Sciences, University of California Santa Cruz, a national toxic algae expert who was not part of the s
ocean; this paper provides critical, quantitative evidence for just that
trend, confirming an expected, but difficult to test, direct link between toxic blooms to climate,» said Dr. Raphael Kudela, Professor
of Ocean Sciences, University of California Santa Cruz, a national toxic algae expert who was not part of the s
Ocean Sciences, University
of California Santa Cruz, a national toxic algae expert who was not part
of the study.
For example, at this point only about 5 %
of the world's
oceans are surveyed well enough to detect the presence
of rare cetacean species or
trends in common ones.
Gregoire created the panel earlier this year to examine the implications
of dropping pH levels in seawater, a
trend caused by the
ocean's absorption
of carbon dioxide from the atmosphere.
«The impact on our estimates
of the
trends, especially over the
oceans, does seem noteworthy.»
So the report notes that the current «pause» in new global average temperature records since 1998 — a year that saw the second strongest El Nino on record and shattered warming records — does not reflect the long - term
trend and may be explained by the
oceans absorbing the majority
of the extra heat trapped by greenhouse gases as well as the cooling contributions
of volcanic eruptions.
«This is the world's largest meeting
of marine mammal professionals, and the place we all compare notes and look for patterns and
trends that help us piece together important changes out in the
ocean,» said NOAA Fisheries research scientist Jay Barlow, a co-author
of the new humpback research and president - elect
of the Society.
This sustained climate warming will drive the
ocean's fishery yields into steep decline 200 years from now and that
trend could last at least a millennium, according to University
of California, Irvine, and Cornell University researchers in Science, March 9.
Your statement that «Thus it is natural to look at the real world and see whether there is evidence that it behaves in the same way (and it appears to, since model hindcasts
of past changes match observations very well)» seems to indicate that you think there will be no changes in
ocean circulation or land use
trends, nor any subsequent changes in cloud responses thereto or other atmospheric circulation.
Regional
trends are notoriously problematic for models, and seems more likely to me that the underprediction
of European warming has to do with either the modeled
ocean temperature pattern, the modelled atmospheric response to this pattern, or some problem related to the local hydrological cycle and boundary layer moisture dynamics.
Gentlepeople, well done on nipping any controversy in the bud — as usual; though I'm left wondering if the warming
trend isn't related to a subject that i'd like to see Real Climate Address more often; The possible shut - down
of The North Atlantic Conveyor — as extreme warming
of the Southern
Oceans, along with the plunging
of Europe into a new Ice Age would be the result
of this, as I'm sure you all know.
Observations
of upper
ocean heat show some short term cooling but measurements to greater depths (down to 2000 metres) show a steady warming
trend: However, the
ocean cooling myth does seem to be widespread so I'll shortly update this page to clarify the issue.
Indeed, Hoerling and Kumar, in their ’03 Science article «The Perfect
Ocean for Drought», make a fairly compelling argument that this
trend is associated with a
trend towards enhanced drought in regions such as the desert southwest
of the U.S., a pattern we typically associate with «La Nina».
Time series
of temperature anomaly for all waters warmer than 14 °C show large reductions in interannual to inter-decadal variability and a more spatially uniform upper
ocean warming
trend (0.12 Wm − 2 on average) than previous results.
Given the strength
of the Hurst coefficients — something we all agree on — is it not possible that a large portion
of the current warming
trend is a product
of internal climate variability, as mediated by complex dynamics
of ocean circulation?
To confirm these
trends and find out what was behind them, Ritter et al. used the products
of the Surface
Ocean pCO2 Mapping (SOCOM) intercomparison project to track carbon dioxide (CO2)
trends in the Southern
Ocean.
Shifts in internal temperature variability, measured through SST variance and skewness, are also occurring and contribute to much
of the MHW
trends observed over the remainder
of the global
ocean, particularly for MHW duration and intensity.
In the lower left panel
of Figure 1, which shows temperature
trends since 1979, the pattern in the Pacific
Ocean features warming and cooling regions related to El Niño.
If we think
of hurricanes as Stirling heat engines, then we realize that the two reservoirs are the mixed layer
of the surface
ocean (1) and the upper atmosphere (2); note that there is a general
trend of stratospheric cooling as well.
In fact, we find the model range is an excellent predictor
of observed
trends and their uncertainty due to random chaotic processes in the atmosphere and
ocean.»
blaming the results reported in Nature on a» chain
of heat - venting sub-sea islands», which given the continental
trend, seems even more bizarre than invoking volcanic activity in the Arctic
ocean
This
trend is key because the
oceans absorb about 93 percent
of all the excess heat trapped by greenhouse gases.
However, if one downweights these two events (either by eliminating or, as in Cane et al» 97, using a «robust»
trend), then an argument can be made for a long - term pattern which is in some respects more «La Nina» - like, i.e. little warming in the eastern and central equatorial Pacific, and far more warming in the western equatorial Pacific and Indian
oceans, associated with a strengthening, not weakening,
of the negative equatorial Pacific zonal SST gradient.
Our general circulation model simulations, which take into account the recently observed widespread occurrence
of vertically extended atmospheric brown clouds over the Indian
Ocean and Asia3, suggest that atmospheric brown clouds contribute as much as the recent increase in anthropogenic greenhouse gases to regional lower atmospheric warming
trends.
«The challenge is really first understanding what the natural variability looks like in this data - poor region, and then making measurements long enough that we can tease out the long - term
ocean acidification
trend, which is this gradual increase through time,» he said «It's really hard to see with just one or two years
of data.»
To remove this difference in magnitude and focus instead on the patterns
of change, the authors scaled the vertical profiles
of ocean temperature (area - weighted with respect to each vertical
ocean layer) with the global surface air temperature
trend of each period.
(1) The warm sea surface temperatures are not just some short - term anomaly but are part
of a long - term observed warming
trend, in which
ocean temperatures off the US east coast are warming faster than global average temperatures.
From his own research in chemical oceanography, along with data from a number
of recent studies, Weber points out that some negative consequences
of greenhouse gas emissions and warming «are manifesting faster than previously predicted,» including
ocean acidification and oxygen loss, which are expected to affect «a large fraction
of marine species if current
trends continue unchecked.»
Over the period 1984 — 2006 the global changes are 0.28 °C in SST and − 9.1 W m − 2 in Q, giving an effective air — sea coupling coefficient
of − 32 W m − 2 °C − 1... [D] iminished
ocean cooling due to vertical
ocean processes played an important role in sustaining the observed positive
trend in global SST from 1984 through 2006, despite the decrease in global surface heat flux.
The study highlighted significant impacts
of this
trend, including land clearing for farming, logging and settlement; introduction
of invasive species; carbon emissions leading to climate change and
ocean acidification; and toxins that poison the ecosystem.
Based on the linear
trend, for the 0 to 3,000 m layer for the period 1961 to 2003 there has been an increase
of ocean heat content
of approximately 14.2 ± 2.4 × 1022 J, corresponding to a global
ocean volume mean temperature increase
of 0.037 °C during this period.
Linear
trends (1955 — 2003)
of change in
ocean heat content per unit surface area (W m — 2) for the 0 to 700 m layer, based on the work
of Levitus et al. (2005a).
Linear
trend (1955 — 2003)
of zonally averaged temperature in the upper 1,500 m
of the water column
of the Atlantic, Pacific, Indian and World
Oceans.