What's the latest view on the ability of GCMs to capture
regional scale changes?
Not exact matches
The major banks tended to
scale back their
regional presence, in response to the cost pressures on them after the events of the early 1990s, and the
changing economics of branch banking which became apparent as financial liberalisation proceeded.
They are less thorough at simulating
changes on a
regional scale.
However, the potential impact is less clear at
regional scales, but it is likely that climate variability and
change will exacerbate food insecurity in areas currently vulnerable to hunger and undernutrition.
«Altogether our study highlights how sensitive
regional weather conditions are to any
changes in large -
scale atmosphere dynamics,» says Coumou.
Once considered remote and disconnected, now we know that
changes within the Arctic can have a direct impact on the rest of the world, affecting physical and biological systems near and far at
regional and global
scales.
To solve this problem, Pielke suggested measuring environmental variables from a
regional scale up to a global
scale as a more inclusive way to assess environmental risks than the top - down approach used by the Intergovernmental Panel on Climate
Change.
«The climate projections were created using different downscaling methods, but the projected
changes in climate among them are similar at the
regional scale.»
The analysis uses methods that have already been peer - reviewed, including examining the
change in occurrence of such extreme rains in the historical record and in climate models, as well as using finer -
scale regional climate models to compare the current climate to one without warming.
These pollution particles are also implicated in climate
change issues at
regional and global
scales.
Building on this research, the Union of Concerned Scientists is now collaborating with leading scientists who study climate
change consequences at a
regional scale and beyond.
There is relatively little consensus about how climate
change will affect the incidence of persistent drought at global and
regional scales, in large part due to the uncertainties discussed above.
January 2004: «Directions for Climate Research» Here, ExxonMobil outlines areas where it deemed more research was necessary, such as «natural climate variability, ocean currents and heat transfer, the hydrological cycle, and the ability of climate models to predict
changes on a
regional and local
scale.»
New research published this week in the Journal of Climate reveals that one key measurement — large -
scale upper - ocean temperature
changes caused by natural cycles of the ocean — is a good indicator of
regional coastal sea level
changes on these decadal timescales.
Major consequences of such
changes over
regional scales will probably include (1) reductions in primary production combined with (2) shifts from diatom - dominated (low SA: V ratio) phytoplankton assemblages with high POC - export efficiencies to picoplankton communities (high SA: V ratio) characterized by low export efficiencies (Smith et al., 2008; Morán et al., 2010; Morán et al., 2015).
These programs focus on climate, aerosol and cloud physics; global and
regional scale modeling; integrated assessment of global
change; and complex
regional meteorology and chemistry.
A particular challenge for science is the growing evidence that social - ecological interactions across
scales can generate regime shifts where profound and abrupt
changes can occur in systems ranging from local ecosystems (such as lakes) to large biomes (such as the Arctic); from local communities (such as farming systems) to
regional economic sectors (e.g., global fisheries).
This module will ensure accurate, consistent, comparable,
regional scale, long ‐ term measurements of ocean parameters, which are key to addressing urgent societal and scientific challenges such as climate
change, ocean ecosystem disturbance, and marine hazards.
Within the integrated Earth system science paradigm, our major research thrusts include the physics and chemistry of aerosols, clouds and precipitation; integrating our understanding of climate, energy, and other human and natural systems through the development and application of models that span a wide range of spatial
scales; and determining the impacts of and informing responses to climate and other global and
regional environmental
changes.
By comparison, the average
change from 15 to 7 thousand years ago was ~ 0.005 °C per decade, although this was occasionally punctuated by short - lived (and possibly
regional -
scale) abrupt climatic jolts, such as the Younger Dryas, Dansgaard - Oeschger and Heinrich events.
WestEd is a leader in moving research into practice by conducting research and development (R&D) programs, projects, and evaluations; by providing training and technical assistance; and by working with national,
regional, state, and local policymakers and practitioners to carry out large -
scale school improvement and innovative
change efforts.
In sub-Saharan Africa and South Asia, South America and East Asia, AgMIP
regional research teams (RRTs) are conducting integrated assessments to improve understanding of agricultural impacts of climate
change (including biophysical and economic impacts) at national and
regional scales.
Indeed, the utility of the term in describing past climate
changes at
regional scales has been questioned [see e.g. Jones, P.D., Mann, M.E., Climate Over Past Millennia, Reviews of Geophysics, 42, RG2002, doi: 10.1029 / 2003RG000143, 2004 and references therein.]
Seen from that perspective the
regional change becomes part of
changes on a much larger
scale, even though proximate causes are by definition always local.
1993 Greenland ice cores suggest that great climate
changes (at least on a
regional scale) can occur in the space of a single decade.
The attribution of the term at
regional scales is complicated by significant
regional variations in temperature
changes due to the the influence of modes of climate variability such as the North Atlantic Oscillation and the El Nino / Southern Oscillation.
At the hemispheric - mean
scale, the «Little Ice Age» is only a moderate cooling because larger offsetting
regional patterns of temperature
change (both warm and cold) tend to cancel in a hemispheric or global mean.
The new research is a
regional climate study of historical sea level pressures, winds and temperatures over the eastern Pacific Ocean and draws no conclusions about climate
change on a global
scale.
Ocean salinity
changes, while unimportant for sea level at the global
scale, can have an effect on
regional sea level (e.g., Antonov et al., 2002; Ishii et al., 2006; Section 5.5.3).
-- Projected precipitation and temperature
changes imply
changes in floods, although overall there is low confidence at the global
scale regarding climate - driven
changes in magnitude or frequency of river - related flooding, due to limited evidence and because the causes of
regional changes are complex.
Especially at the
regional scale, ocean and atmospheric circulation
changes are clearly also important.
That is,
changes to the system are more clearly discerned in the global mean temperature than at a
regional level, mainly because the noisy «weather» component increases as you go to smaller
scales.
Concerning climate -
change forecasting, we can not expect that increased computer power and improved climate models will in the future «give more precise probability distributions of outcomes at the
regional and decadal
scales».
To me, the most important thing is finding large
scale physics that help make sense
regional changes.
While the anomalous nature of recent trends in global average temperature is often highlighted in discussions of climate
change,
changes at
regional scales have potentially greater societal significance.
The terrestrial biosphere can respond slowly to large,
regional -
scale forcing, but may not always be in equilibrium with that forcing at any point in time, leading to subsequent commitments to significant future
change for decades or centuries following stabilization of forcing.»
Most studies omit two forcings that could have significant effects, particularly at
regional scales, namely carbonaceous aerosols and land use
changes.
You are correct that
regional and average weather
changes over various time
scales of interest, and that extreme events continue to occur.
To mitigate climate
change at local,
regional, and global
scales, we must begin to think beyond greenhouse gases.
Can the models provide skillful predictions of
changes in
regional climate statistics on multi-decadal time
scales?»
Using this approach, we prove that
changes in climatic and hydrological parameters at global and
regional scales are directly or indirectly reflected in sea - level regime.
Global and
regional climate models have not demonstrated skill at predicting
regional and local climate
change and variability on multi-decadal time
scales.
More recent assessments combining global - and
regional -
scale analysis, impacts of climate
change on growing periods and agricultural systems, and possible livelihood implications, have also been examined (Jones and Thornton, 2003; Huntingford et al., 2005; Thornton et al., 2006).
While exploring the local - level dynamics of people's vulnerability to climate
change, of which adaptive capacity is a key component, it is important to find ways to embed such findings into wider
scales of assessment (e.g., country and
regional scales)(Brooks et al., 2005).
The
Regional Climate Impacts theme stresses the need to explain and interpret the potential impacts of global climate variability and
change at the
regional and community
scale.
Third International Climate
Change Adaptation Conference: The Conference titled «Adaptation Futures 2014» will be the nexus between the research community and the users of climate change adaptation information at regional and global
Change Adaptation Conference: The Conference titled «Adaptation Futures 2014» will be the nexus between the research community and the users of climate
change adaptation information at regional and global
change adaptation information at
regional and global
scale.
This should be the main priority, including at multi-decadal AMO
scales, and with the regular occurrence solar minima, as these govern dominant
regional climatic and weather pattern
changes, regardless of relatively small increases in non-condensing GHG forcings.
Contribution from working group I to the fifth assessment report by IPCC TS.5.4.1 Projected Near - term
Changes in Climate Projections of near - term climate show small sensitivity to Green House Gas scenarios compared to model spread, but substantial sensitivity to uncertainties in aerosol emissions, especially on
regional scales and for hydrological cycle variables.
I would not dispute 100 - 300 year oscillations as a possibility, but my reading of the climate records reveals no evidence for a significant role for such oscillations — or at least, no role substantial enough on a global
scale to have created a discernible signal outside of
changes occasioned by solar variations, volcanism, and other known entities (
changes on a
regional scale are a very different matter and may have involved such oscillations).
This presentation will discuss the use of synthesis science by both the SEARCH Permafrost Action Team and Permafrost Carbon Network to identify and understand the widespread implications of
changing permafrost at both
regional and local
scales.