Verdens ekstremt vejr...

The current analysis uses surface air temperatures measurements from the following data sets: the unadjusted data of the Global Historical Climatology Network (Peterson and Vose, 1997 and 1998), United States Historical Climatology Network (USHCN) data, and SCAR (Scientific Committee on Antarctic Research) data from Antarctic stations.

The GHCN/USHCN/SCAR data are modified in two steps to obtain station data from which our tables, graphs, and maps are constructed. In step 1, if there are multiple records at a given location, these are combined into one record; in step 2, the urban and peri-urban (i.e., other than rural) stations are adjusted so that their long-term trend matches that of the mean of neighboring rural stations. Urban stations without nearby rural stations are dropped.

The number of major Atlantic hurricanes per year may almost double by the end of the century in response to global warming, according to a new study.

A team of hurricane researchers suggests that damage from a larger number of very strong — Category 4 and 5 — hurricanes is likely to outweigh a projected decline in less-intense storms1.

The projection that there will be fewer but more intense Atlantic hurricanes is in agreement with results of other groups that have used high-resolution climate models to study hurricane activity.

The world's mountainous regions are home to about 800 million people and the source of some of the world's major rivers. In these regions, runoff is strongly affected by temperature. This suggests that flooding could be quite sensitive to global warming, but there has been some lack of scientific consensus on the effects of temperature variations on floods.

The authors analyzed runoff data recorded by 27 stations in the Swiss Alps...The researchers found that large floods have occurred more frequently in recent years than in the past, and they predict that global warming will result in such floods occurring even more often in the future.

In particular, they found that if global temperatures increase by 2 degrees Celsius, then large floods that occurred about once every 100 years could occur up to 5 times more often.

Recent observations show that Beaufort Sea ice was not as it appeared in the summer of 2009. Sea ice cover serves as an indication of climate and has implications for marine and terrestrial ecosystems.

In early September 2009, satellite measurements implied that most of the ice in the Beaufort Sea either was thick ice that had been there for multiple years or was thick, first-year ice.

However, in situ observations made in September 2009 by Barber et al. show that much of the ice was in fact "rotten" ice -- ice that is thinner, heavily decayed, and structurally weak due to a uniform temperature throughout.

NATURE:...

The research aircraft "Polar 5" today concluded its Arctic expedition in Canada. During the flight, researchers measured the current ice thickness at the North Pole and in areas that have never before been surveyed. The result: The sea-ice in the surveyed areas is apparently thicker than scientists had suspected.

Hvis nogen finder linket vil jeg gerne modtage et praj om hvor artiklen findes

Prøv at se lidt nærmere på de øvrige artikler og indslag han har lavet... det er IKKE en public service station værdigt

Med en middeltemperatur for hele måneden som helhed på -3,2 grader, så skal vi nemlig helt tilbage til 1987 for at finde en måned, der har været koldere.

Januar 2010 skriver sig således ind i historiebøgerne, som den den koldeste i nyere tid - og dermed er den både koldere end februar 1996 (-2,9 grader) og januar 1996 (-1,8 grader), hvor vi oplevede den seneste isvinter i Danmark.

Kulde i Mongoliet

..the disastrous weather pattern - known locally as a 'zud'..

Locals sometimes differentiate between black, white, and iron/ice zuds....In 1999/2000, 2000/2001 and 2001/2002, Mongolia was hit by three zuds in a row, in which a combined number of 11 million animals were lost. In 2009/2010, approximately 90% of the country was affected by a white zud. By the beginning of February, close to 2 million heads of livestock had perished, and the agriculture ministry predicted that livestock losses might reach 4 million until the end of winter