Andrea J. Dittus et al. Understanding the role of sea surface temperature-forcing for variability in global temperature and precipitation extremes. Weather and Climate Extremes Volume 21, September 2018, Pages 1-9.
The oceans are a well-known source of natural variability in the climate system, although their ability to account for inter-annual variations of temperature and precipitation extremes over land remains unclear. In this study, the role of sea-surface temperature (SST)-forcing is investigated for variability and trends in a range of commonly used temperature and precipitation extreme indices over the period 1959 to 2013. Using atmospheric simulations forced by observed SST and sea-ice concentrations (SIC) from three models participating in the Climate of the Twentieth Century Plus (C20C+) Project, results show that oceanic boundary conditions drive a substantial fraction of inter-annual variability in global average temperature extreme indices, as well as, to a lower extent, for precipitation extremes. The observed trends in temperature extremes are generally well captured by the SST-forced simulations although some regional features such as the lack of warming in daytime warm temperature extremes over South America are not reproduced in the model simulations. Furthermore, the models simulate too strong increases in warm day frequency compared to observations over North America. For extreme precipitation trends, the accuracy of the simulated trend pattern is regionally variable, and a thorough assessment is difficult due to the lack of locally significant trends in the observations. This study shows that prescribing SST and SIC holds potential predictability for extremes in some (mainly tropical) regions at the inter-annual time-scale.
“What the graph shows is the departure from the average for the 30 years from 1981 to 2010. The last data point is February 2019 with a result of -0.03 degrees C. So we have had 40 years of global warming and the temperature has remained flat. In fact it is slightly cooler than the long term average. Is it possible to believe in global warming when the atmosphere has cooled? No, not rationally. Is it possible for global warming to be real if the atmosphere has cooled? Again no.” click here
“The Arctic is very important for people pushing global warming, because that is where they claim most of the warming is occurring.
In NASA GISS Version 2 (V2) – Iceland was warmer in the 1940s than in recent years.” click here
“Public records also show that your Office is transferring hundreds of thousands of dollars per year in taxpayer money, including apparently a quarter of a million Washington State taxpayer dollars, to pay consultants also to promote your climate advocacy and platform (Contract Number K2191).” click here
“We finally got home from Brisbane where the court hearing was held about 1200 km to the south, and it has been good to reflect on events. I am very hopeful and Judge Vasta seemed to indicate that he would try to hand down his judgement around Easter. So, until then we should wait and see.” click here
“Borenstein, the chief climate reporter for the Associated Press, has a long history of promoting dubious climate claims and essentially lobbying the public to “believe” that man-made climate change is a dire emergency and that government “solutions” are needed.” click here
Hysteria over climate changes is counterproductive. Climate is a dynamic system and is always changing.
“On the climate change, it is an important issue that we have to be addressing, and we are addressing it, but most of the threats from climate change are 50 to 75 years out.” click here
Posted in Climate, EPA
Tagged climate, USEPA