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By Alina Selyukh Alina Selyukh Fri Jul 16, 5:23 pm ET
WASHINGTON (Reuters) The world is enduring the hottest year on record,
according to a U.S. national weather analysis, causing droughts worldwide and a
concern for U.S. farmers counting on another bumper year.
For the first six months of the year, 2010 has been warmer than the first half
of 1998, the previous record holder, by 0.03 degree Fahrenheit, said Jay
Lawrimore, chief of climate analysis at the federal National Climatic Data
Center.
Period of a El Nino weather pattern is being blamed for the hot temperatures
globally.
"We had an El Nino episode in the early part of the year that's now faded but
that has contributed to the warmth not only in equatorial Pacific but also
contributed to anomalously warm global temperatures as well," Lawrimore said.
Abnormally warm temperatures have been registered in large parts of Canada,
Africa, tropical oceans and parts of the Middle East.
Northern Thailand is struggling through the worst drought in 20 years, while
Israel is in the middle of the longest and most severe drought since 1920s. In
Britain, this year has been the driest since 1929.
Also, Arctic sea ice has melted to its thinnest state in June.
However, as cooler temperatures may set in later this year, it remains to be
seen whether 2010 will overtake 2005 as the hottest year overall.
"This year the fact that the El Nino episode has ended and is likely to
transition into La Nina, which has a cooling influence on the global average
temperature, it's possible that we will not end up with the warmest year as a
whole."
EFFECTS ON THE U.S. STATES, FARMERS
The record-warm weather globally hasn't translated into the same in the United
States, where June was only eighth hottest to date.
"For the U.S., January to June, this is only slightly warmer than average,"
Lawrimore said.
What may tip the scale is the development of La Nina, possibly coming in July
and August, according to the National Oceanic and Atmospheric Administration.
Although La Nina means cooling globally, the transition commonly brings hotter
and drier weather to the farming belt of the U.S. Midwest region.
"It's going to be pretty warm across eastern Nebraska, Iowa, western portions
of Missouri, mid to upper 90s (F)," said Donald Keeney, senior agriculture
meteorologist with CROPCAST Ag Services.
The hot temperatures may especially hurt corn pollination, while dry weather
could affect soy bean crops, Keeney said.
But meteorologist with the U.S. Department of Agriculture Eric Luebehusen said
the impact of La Nina is usually delayed for the United States, meaning good
news for corn farmers.
"Most crops are already reproductive," he said, "so if you can last through the
next few weeks, you will pass the really dangerous point where you may sustain
yield losses due to heat."
Drought is developing in some parts of the Mid-Atlantic states, Lawrimore said,
but for now it's moderate and contained in 8 percent of the country. For
comparison, 15 percent of the contiguous United States was in drought last year
at this time, 27 percent in 2008 and almost half in 2007.
(Reporting by Alina Selyukh; Graphic by Jasmin Melvin; Editing by Lisa
Shumaker)