NASA compares rainfall of 2010 and 2005's Atlantic hurricane season

Nov 29, 2010 By Hal Pierce
This image shows the tropical cyclone rainfall occurring in 2010. The tracks of tropical cyclones are shown with black lines. The highest tropical cyclone rainfall totals (between 28 and 32 inches or 71.1 to 81.2 centimeters) were located over the open waters of the Atlantic north of Puerto Rico. The largest rainfall totals appear in pink. Credit: NASA/SSAI, Hal Pierce

The year 2010 was accurately predicted by the National Oceanic and Atmospheric Administration (NOAA) to be an active one with 14-23 tropical cyclones and 8-14 hurricanes predicted. NOAA's National Hurricane Center (NHC) in Miami, Fla. subsequently named 19 storms with 12 reaching hurricane strength.

The 2010 Atlantic season was the most active since the record breaking season of 2005. Hal Pierce of the Measuring Mission, or TRMM satellite team at NASA's Goddard Space Flight Center in Greenbelt, Md. created a comparison between the tropical cyclone rainfall occurring in 2005 and 2010. These tropical cyclone rainfall analyses were both made at NASA Goddard using TRMM-based, near-real time Multi-satellite Precipitation data (TMPA).TRMM is a joint mission between NASA and the Japanese space agency JAXA.

"It is immediately obvious from this comparison that the major difference is the locations of ," Pierce said. "During the 2010 more hurricanes formed in the eastern Atlantic near the Cape Verde islands. These storms were steered around the south and western edge of the Atlantic subtropical high and recurved without touching the United States mainland. For this reason the highest tropical cyclone rainfall totals (between 28 and 32 inches or 71.1 to 81.2 centimeters) were located over the open waters of the Atlantic north of Puerto Rico. Southern Texas was the only location in the United States where 2010 tropical cyclone rainfall was greater than in 2005."

This image shows the tropical cyclone rainfall occurring in 2005. The tracks of tropical cyclones are shown with black lines. The highest tropical cyclone rainfall totals (between 28 and 32 inches or 71.1 to 81.2 centimeters) were located over the Caribbean Sea, eastern Gulf of Mexico, western Cuba and over the waters in the Atlantic off the southeastern U.S. The largest rainfall totals appear in pink. Credit: NASA/SSAI, Hal Pierce

A major concern early in the 2010 season was that hurricanes passing through the Gulf of Mexico would worsen the Deepwater Horizon oil spill disaster that occurred on April 20, 2010. It was feared that a hurricane moving through the oil spill would push oil deep into beaches and estuaries along the northeastern Gulf of Mexico but in 2010 most tropical cyclones were steered away from the mainland. Hurricane Alex ended up only causing a five day delay in the oil spill clean-up efforts.

In 2005, TRMM satellite estimates showed the highest tropical cyclone rainfall totals (between 28 and 32 inches or 71.1 to 81.2 centimeters) were located over the Caribbean Sea, eastern Gulf of Mexico, western Cuba and over the waters in the Atlantic off the southeastern U.S. The largest rainfall totals appear in pink.

Explore further: NASA gets two last looks at Tropical Cyclone Jack

More information: For more information about individual storms in the 2010 hurricane season, visit NASA's 2010 Hurricane page storm index at www.nasa.gov/mission_pages/hurricanes/archives/index.html

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