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Mumbai has over the last four years seen a gradual decline in the number of rain days, states data compiled by the disaster management department of the Brihanmumbai Municipal Corporation (BMC). While it rained on 106 days during the monsoon season in 2006, it only rained on 92 days in 2008. The number further came down to 86 in 2009.

Interestingly, however, even as the number of rain days decreased by almost 19%, for the last year when rains were deficient, the total rainfall witnessed has not deviated much.

Extreme rain events have increased due to climatic changes and global warming, a senior civic official said.

A storm system that stagnated over the Lower Mississippi Valley on May 1st–2nd killed 29 people and flooded thousands of homes and businesses. The storms spawned dozens of tornadoes and brought record amounts of rain to numerous locations in Mississippi, Tennessee, and Arkansas. Preliminary reports indicated that more than 200 daily, monthly, and all-time precipitation records were broken across the three states. According to the National Weather Service, Bowling Green, Kentucky set an all-time daily rainfall record for May of 4.75 inches (120 mm) on May 1st. However, that record was broken the following day as 4.92 inches (125 mm) of precipitation was recorded. The combined total of 9.67 inches (246 mm) was the greatest two-day rainfall total for the area since records began in 1870. In Nashville, the most rain ever recorded in a single calendar day fell on May 2nd—7.25 inches (184 mm)—making the precipitation received on the previous day (6.32 inches or 161 mm) the third-greatest rainfall total in Nashville's history. This led to a record two-day total of 13.53 inches (344 mm), more than doubling the previous record of 6.68 inches (170 mm) received from the remnants of Hurricane Fredrick on September 13th–14th, 1979. By just the second day of the month, Nashville had already recorded its wettest May on record and fifth wettest month ever. The torrential rains caused several rivers to crest at record levels. According to a local U.S. Geological Survey official, the flows on various rivers in the Nashville area exceeded those from the historic 1927 and 1975 floods. The Cumberland River in Nashville crested at 51.85 feet (15.80 m) on May 3rd, nearly 12 feet (3.7 m) above its flood stage—the highest level since an early 1960s flood control project was built (Source: AP). The Duck River in Centerville, Tennessee crested at 47.5 feet (14.4 m), smashing the old record of 37 feet (11.7 m) set in 1983. Fifty-two of Tennesse's 95 counties were declared disaster areas by the governor, as were 73 of Kentucky's 120 counties. Preliminary estimates placed damages at more than 1.5 billion U.S. dollars

HEAVY RAIN and deadly landslides have left 132 people dead and scores missing in southern China, authorities said yesterday, and over a million residents have been evacuated to safety. More storms are forecast and the death toll is expected to rise.More than 10 million people in south China’s nine provinces have been affected by severe floods, the ministry of water resources said, with power cuts, collapsed reservoirs and damage to roads also taking their toll.

Flooding is an annual event in China along the banks of the Yangtze river, which divides north and south China, and the Pearl river delta, which forms the focus of China’s economic powerhouse in Guangdong province. But this year’s floods have been heavier than usual and follow an intense period of drought in the region in the south and eastern seaboard, which left millions without drinking water and destroyed more than 12 million acres of crops.

The intense rainstorms started in mid-June in the provinces, which include Fujian, Jiangxi and Hunan, and the state-run CCTV station broadcast footage of rescues by boat and helicopter as the People’s Liberation Army rescue teams arrived at the site.

The nation’s heaviest rains in June poured down on Nebraska and Iowa. Records were set across both states.Iowa recorded its rainiest June in 138 years and its second-rainiest month ever, exceeded only by the rainfall of July 1993, which led to that year’s “Great Flood.”Northeastern Nebraska saw the state’s heaviest rains, with some areas recording three times the normal amount. Some places got nearly 17 inches.Near Ericson — where nearly 13 inches fell — a dam burst, draining a popular fishing lake.

The first heavy downpour of the morning had carried debris and vegetation into the 2.7m by 2.7m culvert, starting a chain of events that led eventually to the flash flood.It was choked where it drained into the side of Delfi Orchard, so water was directed only into the side along Forum the Shopping Mall.When a second intense rainstorm the same morning added more water to the drains within a short period of time, the canal overflowed and water gushed up to the surface of Orchard Road, causing the worst floods there in 26 years.

Although national water agency PUB alerted the traffic police when the sensors at the start of each Stamford Canal channel indicated water levels were at 75 per cent, the water level rose too abruptly to get the alert out to shopkeepers.At a press conference yesterday, the PUB said the heavy rains were responsible for sweeping the debris into the drain.

What was unusual about Wednesday's storm was its intensity and its two peaks, he said. The first peak could have brought a certain amount of debris, and there was no way for PUB officers to safely check and clean it out. The next peak soon after might have brought even more debris.

Oklahoma City's rainiest day in history brought rampaging floods to the city and surrounding areas yesterday, as widespread rain amounts of 8 - 11 inches deluged the city. Fortunately, no confirmed deaths or injuries have been blamed on the mayhem, though damage is extensive. Oklahoma City's Will Rogers Airport received 7.62" of rain yesterday, smashing the record for the rainiest day in city history. According to the National Climatic Data Center, the city's previous rainiest day occurred September 22, 1970, when 7.53 inches fell. Some rivers continue to rise due to all the rain, and the Canadian River east of downtown Oklahoma City is four feet over flood stage, with major flooding expected today.

China issued a fresh heatwave alert Wednesday as soaring temperatures -- some of them record highs -- were again forecast for large swathes of the nation, sparking concerns about power shortages.The National Meteorological Centre warned that large parts of northern and central China would again be hit by "sweltering heat and very little rain", with temperatures set to hit 40 degrees Celsius (104 degrees Fahrenheit).It set the heat alert at "orange" -- the second-highest rating on a four-colour scale.The extreme heat, which began at the weekend in most areas, has led to hospital wards packed with people suffering from heat-related illnesses, a surge in air-conditioner sales and even a plague of locusts in Inner Mongolia.

Zookeepers

used giant ice blocks to keep animals cool, the Xinhua news agency reported.In several cities including Beijing, where the temperature hit 40.6 degrees Celsius on Monday, authorities reported that overheated vehicles had caught fire, state media said.The heatwave comes after torrential rains in June, mainly in southern parts of the nation, caused massive floods and landslides that killed at least 266 people.The soaring temperatures have led to fears of power shortages in several provinces due to high demand for air conditioning, the state-run Global Times reported.In the southern city of Guangzhou, authorities had opened nearly 500 shelters equipped with air-conditioning units and water for people to escape the heat, the report said.Water demand has also soared along with the high temperatures.In Beijing on Monday, nearly three million cubic metres of water was pumped into the capital, the largest single-day usage since tap water was brought into operation in 1910, the China Daily reported.Authorities in the capital said they would double a "high temperature" subsidy for people working outside in the heat, or whose workplaces were hotter than 33 degrees Celsius.Those who work outside will now get an extra 120 yuan (18 dollars) a month, while people in hot indoor places will be paid 90 yuan, the report said.

With torrential rains and record flooding hitting the Nashville area, Tennesseans are getting a first-hand glimpse of the future due to climate change. While individual storms can be driven by a number of factors, more frequent and heavy rains are one of the impacts of climate change that people are already experiencing in many areas of the United States. “While major storms are expected this time of year in the U.S. Southeast, global warming contributes to higher air and sea temperatures that in turn promote increased moisture in the atmosphere and more intense rainfall events,” said Dr. Kevin Trenberth, Head of the Climate Analysis Division at the National Center on Atmospheric Research.  “Any resulting flooding has a direct consequence on people’s well-being and livelihood.  Unless we address the root causes of climate change, we are likely to see more of these extreme storms in our future.” The National Oceanic and Atmospheric Administration (NOAA) recently reported that the southeastern United States has witnessed a 20 percent increase in heavy precipitation from 1958-2007, which is driven by climate change.

The 3-mile- (4,884-meter-) high glacier was pounded by rain every afternoon during the team's 13-day trip, something the American scientist has never encountered in three decades of drilling ice cores. He lay awake at night listening to the water gushing beneath him. By the time they were ready to head home, ice around their sheltered campsite had melted a staggering 12 inches (30 centimeters). "These glaciers are dying," said Thompson, one of the world's most accomplished glaciologists. "Before I was thinking they had a few decades, but now I'd say we're looking at years."

The mountain has lost about 80 percent of its ice since 1936 - two-thirds of that since the last scientific expedition in the early 1970s. Thompson says he thinks temperatures are rising twice as fast in high altitudes as at the earth's surface, which, if true, could have broad implications on people who depend on glaciers for water during the dry season, such as in the Himalayas.

Geoffrey Hope, a professor at Australian National University who took part in the 1971 expedition to Puncak Jaya, noted that Papua has the wettest mountain region in the world, so high precipitation levels didn't come as a great surprise. Still, his own experience was markedly different. "The roof of our marque tent fell in on many evenings due to the weight of the snow," he recalled, "and all water coming from the glacier would freeze by 8 p.m. each night."

Bolstered by mild winters and heavy spring rains, the poison ivy creeping across the Chicago landscape this summer is at bumper crop levels.The abundance of poison ivy and other invasive plants proliferating in Illinois and across much of the nation this year is a symptom of a scenario more serious than an itchy red rash, experts say.Elevated CO2 levels in the atmosphere, although destructive to many plant species, are proving a boon for adaptive weeds such as poison ivy, said Lewis Ziska, a federal plant physiologist.

"We are up to our arms in poison ivy this summer," said Ziska, with the USDA's Agricultural Research Service in Beltsville, Md. The higher CO2 levels, he said, also are contributing to an increasing abundance of kudzu, the legendary vine once limited to the South but was discovered lurking in central Illinois and as far north as Canada. Dr. Paul Epstein, associate director for the Center for Health and the Global Environment at Harvard Medical School, said recent studies show that poison ivy is not only more prevalent across the U.S. but more toxic, too. The rise in CO2 levels strengthens an oil in the plant that triggers itchy havoc when it touches the skin, he said. The heavy rains, warmer temperatures and rising CO2 levels that have disturbed plant chemistry also have increased pollen counts, leading to higher rates of asthma and allergies. "It's not an accident we're having this perfect storm," said Epstein. "Pests and pathogens thrive in extreme events, like floods or droughts. We need to stabilize the climate by reducing fossil fuel emissions dramatically." John Masiunas, an associate professor in the Department of Crop Sciences at the University of Illinois Urbana- Champaign, said he is unaware of any quantitative data tracking an increase in poison ivy taking root across the state. But, he said, "it makes perfect sense that higher CO2 levels will make these plants more efficient." The plant has "a survivor's ability" to grow in a variety of environments, Masiunas said, adding that climate change is also detrimental to endangered species such as native thistles and orchids that require specific soils and pollinators to thrive. "When climate change occurs … it is poor for these plants and contributes to the extinction of the species," Masiunas said. "When endangered plants are competing in an agricultural ecosystem, they start losing, and plants like poison ivy start doing better."

Thursday Flood Risk (and the most severe 30 days in Minnesota history?)

Paul's Star Tribune Outlook for the Twin Cities and all of Minnesota

we just lived through an incredible 30-day period. According to the local National Weather Service Office in Chanhassen we experienced 395 severe storms between June 17 and July 17. That compares to 120 severe storms in all of 2009! So in a mere 30 days we saw more than 3 TIMES more severe weather than we did all of last year.

KENT NEWS

While some producers are celebrating bumper crops courtesy of the early summer heatwave, others are advising producers look to embrace more exotic crops for long-term prosperity. Cherries are among this year’s big hits while wine producers are also raising a glass to the ideal conditions for their grapes. Although, ironically, it has proven too hot for some summer classics. Meanwhile, fruits traditionally associated with warmer parts of Europe – such as apricots, nectarines, and corn on the cob – are already being grown successfully here. There are even some variations on Kentish classics which are now blossoming. Apple varieties such as braeburn apples, which never used to survive in the UK, are already pushing out more traditional types. And scientists say it is all down to the effects of climate change.

The vineyard also escaped the effects of the long, cold winter, he said: “We’ve been very lucky in this corner of the country. With the frosts in April and early May we got down to minus two very close to the buds being frosted off the vines. But not quite.” Now, Mr Barnes said he was hoping the weather stayed dry for the harvest at the end of September. Apples growers have also enjoyed the hot, sunny weather, but said the recent downpours were welcome. Sarah Calcutt, business development manager at Norman Collett, which markets English fruit from its base in Paddock Wood, said the extra light and warmth had been great for Rubens, a new variety of apples. “I’ve been out looking at orchards today with the National Fruit Show president and we’ve been particularly looking at Rubens. “We do not know if it will be a bumper crop yet because they won’t be picked until to September, but from an apple’s perspective the heat and sunshine in particular are great. “Photosynthesis is better with good light because it seeds the tree really well and gives it good energy for feeding themselves next year. A lot of day light hours are wonderful. “We’ve just had rain in time. One of the farmers who has no irrigation system said this bit we’ve just had came just in time for his young trees, which were starting to look a bit stressed. So the recent downpours have been fantastic.” However, organic fruit farmer Mrs Martin said that it had been a bad year for some fruits. “Raspberries are not looking very good this year. It was too hot for them and they were cooking on the plants,” she said. “But a little rain does everything good.” Dr Chris Atkinson, head of science at East Malling Research Centre, which has been collecting climate data since 1913, said the climate was a big determinate when growing fruit because temperature and rainfall had a big impact on crops. The climate data shows that the seasons have been getting longer and the winters are getting milder. “We can even answer sceptics about climate change – no one can argue that climatic data shows it is changing,” he said.

The Three Gorges dam on China's longest river, the Yangtze, is standing up to its biggest flood control test since completion last year, officials say. Floodwaters in the giant reservoir rose 4m (13ft) overnight, and are now just 20m below the dam's maximum capacity.

The flow of the water overnight was the fastest ever recorded, at 70,000 cubic metres per second. Dr Cao Guangjing, head of China Three Gorges Corporation, told the BBC that 40,000 cubic metres/second were released, with 30,000 cubic metres/second of water held back in the reservoir.

More than 35 million people across China have been affected by the poor weather and 1.2 million have been relocated. China is facing its worst floods since 1998, when more than 4,000 people died, and 18 million people were displaced, the China Daily newspaper said.

According to a recent press release from AlphaGalileo, a resource for European research news, a study lead by researchers from the Madrid Carlos III Institute of Health shows cholera cases in Zambia are increasing as temperatures rise. Their study results confirm that an increase in environmental temperature six weeks before the rainy season also increases the number of people affected by cholera at a rate of 4.9%. “This is the first time that it has become evident in the sub-Saharan region that the increase in environmental temperature is related to the increase in cholera cases,” says Miguel Ángel Luque, one of the study’s authors, in the press release. The research project, which was done in Zambia between 2003 and 2006, analyzes data from three cholera epidemics. The results show that climatic variables, such as rain and environmental temperature, are related to the increase in cholera cases during the epidemic period. Experts affirm that cholera has a seasonal component associated with the rain season. An increase in temperature six weeks before this period is related with a 4.9% increase in the number of cases of this sickness within the population. The study also showed that  a 1º C increase in temperature six weeks before the beginning of the outbreak explains the 5.2% increase in cholera cases during an epidemic.

According to a recent press release from AlphaGalileo, a resource for European research news, a study lead by researchers from the Madrid Carlos III Institute of Health shows cholera cases in Zambia are increasing as temperatures rise. Their study results confirm that an increase in environmental temperature six weeks before the rainy season also increases the number of people affected by cholera at a rate of 4.9%.

while weather patterns are some of the most visible indicators of climate change, we are able to look at other patterns in the ecosystem as equally important measurements.  Among these patterns are jellyfish blooms, which are proliferating at an incredible pace. 

There are a number of factors contributing to the increase of jellyfish blooms, most of which are linked to global warming.  Jellyfish are thriving due to warmer and saltier waters as well as an increase in plankton growth.  In addition, overfishing has created a niche for jellyfish to exploit.  In years before predators were consuming much more of the ocean’s nutrients.  Now however, there is less competition leaving more for jellyfish.  This is also the case with agricultural runoff, where jellyfish are able to capitalize on the organisms feeding on the bacteria.  The current trend in climate change shows that the ice cover is melting much later in the spring, spawning more rapid and increased amounts of plankton growth.  There are various theories based on this evidence, but perhaps the strongest supports the idea that increased sunlight is favorable for the plankton.  This is especially true in colder regions such as the Bearing Sea, where scientists and fisherman alike have noticed drastic increases in jellyfish blooms.  But despite recent awareness, population control will only be a reality once the global climate patterns stabilize. For most, summer draughts mean hot days and dry gardens.  For jellyfish, however, it means saltier waters.  As rain becomes less frequent there is less fresh water entering the ocean.  Although it’s not the case with all jellyfish, most will benefit from a higher salt content.  This also relates to other predators and fish species, which are less tolerant of the salt increase and will often move from the coast into deeper, less salty waters.  As the ocean gets warmer and the water level rises, the jellyfish survival rate also goes up.  It creates the right conditions for jellyfish blooms to prosper, which results in a longer span of migration.  Now there are jellyfish species that are being labeled invasive.  Beachgoers have to swim with a new element of caution, unable to know which new species has moved in, and which has left. 

Climate Change Is Beginning to Disrupt Agriculture

Climate variability has already affected rains, droughts and temperatures in several parts of the United States, said Cynthia Rosenzweig, a senior research scientist with NASA's Goddard Institute for Space Studies. "We are already seeing climate change." "We are seeing the expansion of drying," said Rosenzweig, as she brought up a slide showing precipitation measurements across the United States. The measurements, comparing values from 1958 through 2008, showed significant reductions in rainfall across large portions of the Northwest and Southeast. Idaho, Washington, Montana, Georgia and Florida had some of the most drastic changes in rainfall on the map. However, the opposite is not good either, she said, adding that increased soil moisture in some areas could potentially harbor insects and other pests. And, in general, "crops do not like to have their feet wet." Aside from concerns about rainfall, local temperature is also extremely important for crop performance. The reproductive development in many important grains is a process sensitive to temperature, said Paul Gepts, a professor of agronomy at the University of California, Davis. Some plants need cold winters One of the potential side effects of climate change is a trend toward milder winters in some regions. Vital plants, Gepts said, require a cold winter in order to properly develop their seeds for the next season. Rosenzweig agreed. Heat waves, at odd times of the year, affect the proper development of proteins within corn kernels, she said. "It is like scrambling eggs." Gepts also presented a number of well-known strategies for mitigating some of the possible economic effects of climate change on agriculture. Aside from breeding plants to be more drought-, heat- and pest-resistant, he also suggested varying the types of crops maintained on a particular site on the basis of environmental suitability.