The results of the DCPP are a contribution to the 6th Coupled Model Intercomparison Project (CMIP6), to the WCRP Grand Challenge on Near Term Climate Prediction (NTCP), potentially to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC), to the Global Framework for Climate Services (GFCS), and as one of the bases for the development of a WMO Commission for Basic Systems (CBS)
Global Decadal Climate Outlook (GDCO) in support of applications.
Not exact matches
The working group on coupled biogeochemical cycling and controlling factors dealt with questions regarding the role of plankton diversity, how ocean biogeochemistry will respond to
global changes on
decadal to centennial time scales, the key biogeochemical links between the ocean, atmosphere, and
climate, and the role of estuaries, shelves, and marginal seas in the capturing, transformation, and exchange of terrestrial and open - marine material.
A recurring cyclical pattern in
global or regional
climate that often occurs on
decadal to sub-
decadal timescales.
The AMO is linked with
decadal climate fluctuations, such as Indian and Sahel rainfall, European summer precipitation, Atlantic hurricanes and variations in
global temperatures.
oscillation A recurring cyclical pattern in
global or regional
climate that often occurs on
decadal to sub-
decadal timescales.
Yeh, S. - W., and B.P. Kirtman, 2004:
Decadal North Pacific sea surface temperature variability and the associated
global climate anomalies in a coupled GCM.
The big takeaway from this study: While there is uncertainty in projections for changes in the
climate indices reviewed here (especially El Niño and La Niña), this study serves to alert us to the fact that the
climate impacts that our local coastal communities face are based in large part on changes that occur on both a large,
global scale and over the long,
decadal term.
That's largely because of the effects of a slow - moving ocean cycle, the Pacific
Decadal Oscillation, which influences the
global climate.
His research concerns understanding
global climate and its variations using observations and covers the quasi biennial oscillation, Pacific
decadal oscillation and the annular modes of the Arctic oscillation and the Antarctic oscillation, and the dominant spatial patterns in month - to - month and year - to - year
climate variability, including the one through which El Niño phenomenon in the tropical Pacific influences
climate over North America.
Brown, P. T., W. Li, L. Li, and Y. Ming (2014), Top - of - atmosphere radiative contribution to unforced
decadal global temperature variability in
climate models, Geophys.
Mike's work, like that of previous award winners, is diverse, and includes pioneering and highly cited work in time series analysis (an elegant use of Thomson's multitaper spectral analysis approach to detect spatiotemporal oscillations in the
climate record and methods for smoothing temporal data), decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measure
climate record and methods for smoothing temporal data),
decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measure
climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both
climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measure
climate model simulations and observational data for a 50 - 70 year oscillation in the
climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measure
climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval
Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measure
Climate Anomaly and Little Ice Age, the relationship between the
climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measure
climate changes of past centuries and phenomena such as Atlantic tropical cyclones and
global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measurements).
In the Swanson and Tsonis paper it is suggested that the
decadal variations of the
global mean temperature, the
climate shifts, observed in the 20th century are basically caused by the synchronization of four modes.
«The forecast for
global mean temperature which we published highlights the ability of natural variability to cause
climate fluctuations on
decadal scale, even on a
global scale.
It appears that Ghil, and others specifically warn against the use of MEM and temperature data: «Instrumental temperature data over the last few centuries do not seem, for instance, to determine sufficiently well the behavior of
global or local temperatures to permit a reliable
climate forecast on the
decadal timescale by this SSA - MEM method.»
But I would suppose that equilibrium
climate sensitivity [background] and even
global mean surface temperature on a
decadal scale could be better nailed down by model pruning and better ocean data.
On
decadal and longer time scales,
global mean sea level change results from two major processes, mostly related to recent
climate change, that alter the volume of water in the
global ocean: i) thermal expansion (Section 5.5.3), and ii) the exchange of water between oceans and other reservoirs (glaciers and ice caps, ice sheets, other land water reservoirs - including through anthropogenic change in land hydrology, and the atmosphere; Section 5.5.5).
Individual
decadal - resolution palaeoclimatic data sets support the existence of regional quasi-periodic
climate variability, but it is unlikely that these regional signals were coherent at the
global scale.
There are three aspects of the
global weather /
climate system that are fundamental to its workings: the Pacific
Decadal Oscillation, the North Atlantic Oscillation and the El Nino / La Nina perturbations.
[1] The SPCZ can affect the precipitation on Polynesian islands in the southwest Pacific Ocean, so it is important to understand how the SPCZ behaves with large - scale,
global climate phenomenon, such as the ITCZ, El Niño — Southern Oscillation, and the Interdecadal Pacific oscillation (IPO), a portion of the Pacific
decadal oscillation.
«NASA's examination of ocean observations has provided its own unique contribution to our knowledge of
decadal climate trends and
global warming,» said Veronica Nieves, a researcher at JPL and the University of California, Los Angeles and co-author of the new study.
However, this relationship (which, contrary to the claim of MFC09, is simulated by
global climate models, e.g. Santer et al. [2001]-RRB- can not explain temperature trends on
decadal and longer time scales.»
(A) coordinate programs at the National Oceanic and Atmospheric Administration to ensure the timely production and distribution of data and information on
global, national, regional, and local
climate variability and change over all time scales relevant for planning and response, including intraseasonal, interannual,
decadal, and multidecadal time periods;
Ocean and atmospheric indices — in this case the El Niño Southern Oscillation (ENSO), the Pacific
Decadal Oscillation (PDO), the North Atlantic Oscillation (NAO) and the North Pacific Oscillation (NPO)-- can be thought of as chaotic oscillators that are nodes on the network of the
global climate system.
Large - scale
climate variations, such as the Pacific
Decadal Oscillation (PDO), El Niño - Southern Oscillation (ENSO) and North Atlantic Oscillation (NAO), are occurring at the same time as the
global climate is changing.
The IPCC states that prior to 1950 any
global warming was due to natural forces - thus, the +0.41 °C
decadal increase during the early 20th century was due entirely to natural
climate forces.
The mitigation focus is on
global climate and the century time scale, whereas the adaptation focus is regional and on timescales from the seasonal to
decadal.
«In general, understanding how Earth's
climate varies on
decadal timescales and, especially, the way in which fresh water is passed between different reservoirs within the
global water cycle, rightfully remains at the forefront of
climate science with wide - ranging implications with regards to understanding future conditions both in the near - term and long - term.
Strong
decadal climate variability is a signature of the subpolar North Atlantic Ocean, which is also home to the
global overturning circulation.
«The authors write that North Pacific
Decadal Variability (NPDV) «is a key component in predictability studies of both regional and
global climate change,»... they emphasize that given the links between both the PDO and the NPGO with
global climate, the accurate characterization and the degree of predictability of these two modes in coupled
climate models is an important «open question in
climate dynamics» that needs to be addressed... report that model - derived «temporal and spatial statistics of the North Pacific Ocean modes exhibit significant discrepancies from observations in their twentieth - century
climate... conclude that «for implications on future
climate change, the coupled
climate models show no consensus on projected future changes in frequency of either the first or second leading pattern of North Pacific SST anomalies,» and they say that «the lack of a consensus in changes in either mode also affects confidence in projected changes in the overlying atmospheric circulation.»»
In terms of longer timescales (
decadal to century), once the focus becomes regional rather than
global, historical and paleo data becomes more useful than
global climate model simulations (no matter what type of «right - scaling» methods are attempted).
Decadal variations in the North Pacific Gyre Oscillation are characterized by a pattern of sea surface temperature anomalies that resemble the central Pacific El Niño, a dominant mode of interannual variability with far - reaching effects on
global climate patterns5, 6, 7.
http://earthobservatory.nasa.gov/IOTD/view.php?id=8703 Now I realize that I have quoted Josh Willis form the NASA site before — but this is one of the critical Earth systems for many reasons — perhaps least for the changes in
global surface temperature trajectory associated with the
decadal climate shifts.
Boer, G. J., 2009: Changes in interannual variability and
decadal potential predictability under
global waming, J.
Climate, to appear.
Meanwhile, we can recognise the basic patterns and maybe even predict (multi)-
decadal global climate changes.
[DC: As I understand it there is some disagreement among
climate scientists on the impact of
decadal or multi-
decadal natural «oscillations» on
global temperature.
An appropriate title, when discussing the the Keenlyside et al. (2008) paper (not Dr. Latif's speech at the WCC3), would be «
Global surface temperature may not increase over the next decade», and then to clarify that internal climate modes may temporarily halt further global warming because of regional cooling over portions of N. America, N. Atlantic and Europe, and caution that decadal forecasts are in their in
Global surface temperature may not increase over the next decade», and then to clarify that internal
climate modes may temporarily halt further
global warming because of regional cooling over portions of N. America, N. Atlantic and Europe, and caution that decadal forecasts are in their in
global warming because of regional cooling over portions of N. America, N. Atlantic and Europe, and caution that
decadal forecasts are in their infancy.
Unforced variability of
global temperature is great, as shown in Figure 4, but the
global temperature trend on
decadal and longer time scales is now determined by the larger human - made
climate forcing.
Another paper in
Climate Change in 2007 stated: Studies that have looked at hemispheric and
global scales conclude that any urban - related trend is an order of magnitude smaller than
decadal and longer time - scale trends evident in the series (e.g., Jones et al., 1990; Peterson et al., 1999)... Thus, the
global land warming trend discussed is very unlikely to be influenced significantly by increasing urbanization (Parker, 2006).
Regional circulation patterns have significantly changed in recent years.2 For example, changes in the Arctic Oscillation can not be explained by natural variation and it has been suggested that they are broadly consistent with the expected influence of human - induced
climate change.3 The signature of
global warming has also been identified in recent changes in the Pacific
Decadal Oscillation, a pattern of variability in sea surface temperatures in the northern Pacific Ocean.4
Some researchers took the news calmly: in a
global climate that varied daily, seasonally, annually and on a
decadal basis, there was no guarantee of an inexorably steady climb in
global averages, they said.
It suggests that the ocean's natural variability and change is leading to variability and change with enhanced magnitudes over the continents, causing much of the longer - time - scale (
decadal)
global - scale continental
climate variability.
It argues that
Global Climate Models (GCMs) that show
decadal - scale pauses in surface temperature warming tend to exhibit sea surface temperature patterns similar to those of the PDO in a cold phase.
While there still is quite a bit of uncertainty surrounding the effects of the PDO on Earth's
climate, the U.K. Met Office says that «
decadal variability in the Pacific Ocean may have played a substantial role in the recent pause in
global surface temperature rise.»
The conclusion is evident, simple and straightforward: all GCMs adopted by the IPCC fail in correctly reproducing the
decadal and multidecadal dynamical modulation observed in the
global surface temperature record, thus they do not reproduce the observed dynamics of the
climate.
Hurricane Sandy - Extreme Events and
Global Cooling 11/18/12
Global Cooling
Climate and Weather Forecasting 1/22/13
Global Cooling Timing and Amount 2/18/13 Its the Sun Stupid — the Minor Significance of CO2 4/2/13
Global Cooling Methods and Testable
Decadal Predictions.
9.3.1
Global Mean Response 9.3.1.1 1 % / yr CO2 increase (CMIP2) experiments 9.3.1.2 Projections of future
climate from forcing scenario experiments (IS92a) 9.3.1.3 Marker scenario experiments (SRES) 9.3.2 Patterns of Future Climate Change 9.3.2.1 Summary 9.3.3 Range of Temperature Response to SRES Emission Scenarios 9.3.3.1 Implications for temperature of stabilisation of greenhouse gases 9.3.4 Factors that Contribute to the Response 9.3.4.1 Climate sensitivity 9.3.4.2 The role of climate sensitivity and ocean heat uptake 9.3.4.3 Thermohaline circulation changes 9.3.4.4 Time - scales of response 9.3.5 Changes in Variability 9.3.5.1 Intra-seasonal variability 9.3.5.2 Interannual variability 9.3.5.3 Decadal and longer time - scale variability 9.3.5.4 Summary 9.3.6 Changes of Extreme Events 9.3.6.1 Temperature 9.3.6.2 Precipitation and convection 9.3.6.3 Extra-tropical storms 9.3.6.4 Tropical cyclones 9.3.6.5 Commentary on changes in extremes of weather and climate 9.3.6.6 Conc
climate from forcing scenario experiments (IS92a) 9.3.1.3 Marker scenario experiments (SRES) 9.3.2 Patterns of Future
Climate Change 9.3.2.1 Summary 9.3.3 Range of Temperature Response to SRES Emission Scenarios 9.3.3.1 Implications for temperature of stabilisation of greenhouse gases 9.3.4 Factors that Contribute to the Response 9.3.4.1 Climate sensitivity 9.3.4.2 The role of climate sensitivity and ocean heat uptake 9.3.4.3 Thermohaline circulation changes 9.3.4.4 Time - scales of response 9.3.5 Changes in Variability 9.3.5.1 Intra-seasonal variability 9.3.5.2 Interannual variability 9.3.5.3 Decadal and longer time - scale variability 9.3.5.4 Summary 9.3.6 Changes of Extreme Events 9.3.6.1 Temperature 9.3.6.2 Precipitation and convection 9.3.6.3 Extra-tropical storms 9.3.6.4 Tropical cyclones 9.3.6.5 Commentary on changes in extremes of weather and climate 9.3.6.6 Conc
Climate Change 9.3.2.1 Summary 9.3.3 Range of Temperature Response to SRES Emission Scenarios 9.3.3.1 Implications for temperature of stabilisation of greenhouse gases 9.3.4 Factors that Contribute to the Response 9.3.4.1
Climate sensitivity 9.3.4.2 The role of climate sensitivity and ocean heat uptake 9.3.4.3 Thermohaline circulation changes 9.3.4.4 Time - scales of response 9.3.5 Changes in Variability 9.3.5.1 Intra-seasonal variability 9.3.5.2 Interannual variability 9.3.5.3 Decadal and longer time - scale variability 9.3.5.4 Summary 9.3.6 Changes of Extreme Events 9.3.6.1 Temperature 9.3.6.2 Precipitation and convection 9.3.6.3 Extra-tropical storms 9.3.6.4 Tropical cyclones 9.3.6.5 Commentary on changes in extremes of weather and climate 9.3.6.6 Conc
Climate sensitivity 9.3.4.2 The role of
climate sensitivity and ocean heat uptake 9.3.4.3 Thermohaline circulation changes 9.3.4.4 Time - scales of response 9.3.5 Changes in Variability 9.3.5.1 Intra-seasonal variability 9.3.5.2 Interannual variability 9.3.5.3 Decadal and longer time - scale variability 9.3.5.4 Summary 9.3.6 Changes of Extreme Events 9.3.6.1 Temperature 9.3.6.2 Precipitation and convection 9.3.6.3 Extra-tropical storms 9.3.6.4 Tropical cyclones 9.3.6.5 Commentary on changes in extremes of weather and climate 9.3.6.6 Conc
climate sensitivity and ocean heat uptake 9.3.4.3 Thermohaline circulation changes 9.3.4.4 Time - scales of response 9.3.5 Changes in Variability 9.3.5.1 Intra-seasonal variability 9.3.5.2 Interannual variability 9.3.5.3
Decadal and longer time - scale variability 9.3.5.4 Summary 9.3.6 Changes of Extreme Events 9.3.6.1 Temperature 9.3.6.2 Precipitation and convection 9.3.6.3 Extra-tropical storms 9.3.6.4 Tropical cyclones 9.3.6.5 Commentary on changes in extremes of weather and
climate 9.3.6.6 Conc
climate 9.3.6.6 Conclusions
Edward A. Barkley (160)-- Here is a
decadal climate model for you: http://www.realclimate.org/index.php/archives/2010/03/unforced-variations-3/comment-page-12/#comment-168530 in which I even venture a prediction of the
global average temperature for the 2010s.
The Pacific
Decadal Oscillation â An Observed Phenomenon in
Global Climate and Pacific Ecology with Implications for Flooding and Drought in Australia.
Let's look in more detail at the paper's key figure, the one that looks at past and (forecast) future
global temperatures, «Hindcast / forecast
decadal variations in
global mean temperature, as compared with observations and standard
climate model projections» (click to enlarge)
The models heavily relied upon by the Intergovernmental Panel on
Climate Change (IPCC) had not projected this multidecadal stasis in «
global warming»; nor (until trained ex post facto) the fall in TS from 1940 - 1975; nor 50 years» cooling in Antarctica (Doran et al., 2002) and the Arctic (Soon, 2005); nor the absence of ocean warming since 2003 (Lyman et al., 2006; Gouretski & Koltermann, 2007); nor the onset, duration, or intensity of the Madden - Julian intraseasonal oscillation, the Quasi-Biennial Oscillation in the tropical stratosphere, El Nino / La Nina oscillations, the Atlantic Multidecadal Oscillation, or the Pacific
Decadal Oscillation that has recently transited from its warming to its cooling phase (oceanic oscillations which, on their own, may account for all of the observed warmings and coolings over the past half - century: Tsoniset al., 2007); nor the magnitude nor duration of multi-century events such as the Mediaeval Warm Period or the Little Ice Age; nor the cessation since 2000 of the previously - observed growth in atmospheric methane concentration (IPCC, 2007); nor the active 2004 hurricane season; nor the inactive subsequent seasons; nor the UK flooding of 2007 (the Met Office had forecast a summer of prolonged droughts only six weeks previously); nor the solar Grand Maximum of the past 70 years, during which the Sun was more active, for longer, than at almost any similar period in the past 11,400 years (Hathaway, 2004; Solankiet al., 2005); nor the consequent surface «
global warming» on Mars, Jupiter, Neptune's largest moon, and even distant Pluto; nor the eerily - continuing 2006 solar minimum; nor the consequent, precipitate decline of ~ 0.8 °C in TS from January 2007 to May 2008 that has canceled out almost all of the observed warming of the 20th century.