Sentences with phrase «author on climate variability»

In 2001, the IPCC was Mann, as Lead Author on climate variability, and a handful of cronies.

Not exact matches

Using an interdisciplinary approach that combined evidence from climate modelling of large 20th - century eruptions, annual measurements of Nile summer flood heights from the Islamic Nilometer — the longest - known human record of environmental variability — between 622 and 1902, as well as descriptions of Nile flood quality in ancient papyri and inscriptions from the Ptolemaic era, the authors show how large volcanic eruptions impacted on Nile river flow, reducing the height of the agriculturally - critical summer flood.

Global warming was not yet an issue at the KNMI where the focus was much more on climate variability, which explains why the article of Hansen et al. was unnoticed at that time by the second author.

Global warming was not yet an issue at the KNMI where the focus was much more on climate variability, which explains why the article of Hansen et al. was unnoticed at that time by the second author.

However, in the paper the authors actually stated that «our conclusion about the dominance of the CRF over climate variability is valid only on multimillion - year time scales».

Lead author Dr Debbie Polson, of the University of Edinburgh's School of GeoSciences, said: «This study shows for the first time that the drying of the monsoon over the past 50 years can not be explained by natural climate variability and that human activity has played a significant role in altering the seasonal monsoon rainfall on which billions of people depend.»

Mann was a Lead Author on the Observed Climate Variability and Change chapter of the Intergovernmental Panel on Climate Change (IPCC) Third Scientific Assessment Report in 2001 and organizing committee chair for the National Academy of Sciences Frontiers of Science in 2003.

Betts says:» the authors seem to assume that climate science is entirely focussed on anthropogenic climate change, and that natural variability is only researched as a supplementary issue in order to support the conclusions regarding anthropogenic influence.»

«The authors write that «the El Niño - Southern Oscillation (ENSO) is a naturally occurring fluctuation,» whereby «on a timescale of two to seven years, the eastern equatorial Pacific climate varies between anomalously cold (La Niña) and warm (El Niño) conditions,» and that «these swings in temperature are accompanied by changes in the structure of the subsurface ocean, variability in the strength of the equatorial easterly trade winds, shifts in the position of atmospheric convection, and global teleconnection patterns associated with these changes that lead to variations in rainfall and weather patterns in many parts of the world,» which end up affecting «ecosystems, agriculture, freshwater supplies, hurricanes and other severe weather events worldwide.»»

«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.»»

Dr. Chris Landsea (a supporter of the natural variability explanation), even resigned in January 2005 as a contributing author to the Intergovernmental Panel on Climate Change (IPCC), after the co-ordinating lead author for his section, Dr. Kevin Trenberth (a supporter of the man - made global warming explanation) held a press conference, implying that the IPCC considered the high hurricane activity of 2004 to be related to man - made global warming.

I co-edited and contributed to the 2003 American Geophysical Union Monograph: The North Atlantic Oscillation: significance and environmental impact and was one of the authors of the 1995 National Academies report on Climate Variability on Decade - to - Century Time Scales.

This short review concludes with an emphasis on the contribution of the author's research on the empirical evidences and physical modeling of both solar and climate variability based on astronomical harmonics.