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GPM Applications: Weather

Using GPM Data for Weather, Climate, and Land Surface Modeling

Friday, February 8, 2019

Using GPM Data for Weather, Climate, and Land Surface Modeling

Variations in rain, snow, and other forms of precipitation are an integral part in everyday weather and long term climate trends. Initialization of short-term weather and long-term climate models with accurate precipitation information enhances their prediction skills and extends their skillful lead times. To get the resolution and temporal coverage to measure precipitation across the globe, we often rely on satellite information. Satellite data can play a fundamental role in our ability to monitor and predict weather systems as well as to forecast future changes to our climate and land surface. Satellite data from GPM’s suite of precipitation products are integrated into numerical weather prediction models that are operated by operational partners to provide and improve the observations from which the forecasts are then generated. Similarly, climate and land surface models use satellite precipitation observations from GPM to describe the conditions that exist today in order to project how conditions may change in the future. The Weather, Climate, and Land Surface Modeling applications area promotes the use of GPM data to help monitor existing weather activity and model future behavior of precipitation patterns and climate.

Overview

Variations in rain, snow, and other forms of precipitation are an integral part in everyday weather and long term climate trends. Initialization of short-term weather and long-term climate models with accurate precipitation information enhances their prediction skills and extends their skillful lead times. To get the resolution and temporal coverage to measure precipitation across the globe, we often rely on satellite information. Satellite data can play a fundamental role in our ability to monitor and predict weather systems as well as to forecast future changes to our climate and land surface. Satellite data from GPM’s suite of precipitation products are integrated into numerical weather prediction models that are operated by operational partners to provide and improve the observations from which the forecasts are then generated. Similarly, climate and land surface models use satellite precipitation observations from GPM to describe the conditions that exist today in order to project how conditions may change in the future. The Weather, Climate, and Land Surface Modeling applications area promotes the use of GPM data to help monitor existing weather activity and model future behavior of precipitation patterns and climate.

Sections

GPM Data for Decision Making

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NOAA Precipitation Forecast Example

NOAA’s Climate Prediction Center (CPC) issues extended range outlook maps for 6-10 days in the future. The above figure shows a 6-10 forecast of precipitation probability for the first week of October 2018. This product complements short-range weather forecasts issued by other components of the National Weather Service. Credit: NOAA/NCEP/CPC
 

Numerical weather prediction (NWP) is the use of computer models to predict upcoming weather. Specifically, NWP centers rely on microwave-based satellite rainfall information, such as data retrieved from GPM’s GMI, to improve short- to long-term weather forecasts and correct track forecasts for tropical cyclones. In addition, NWP centers create precipitation products for “nowcasting” weather in the immediate 1-5 hours (e.g. using near-real-time rainfall data from GPM) to meet the needs of a wider user community, including weather forecasters, hydrologists, farmers, numerical modelers, the military and the climate community. Methods for integrating rainfall data are constantly evolving and advancing, and with GPM’s advanced instruments, scientists can influence and enhance their scientific research and benefit socioeconomic activities.

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ECMWF Seasonal Forecast of Precipitation Probability

European Centre for Medium-Range Weather Forecast (ECMWF) Seasonal Forecast of precipitation probability. Percent probability is determined by using the predictive anomaly relative to 24 years of observed precipitation from 1993-2016. Credit: European Centre for Medium-Range Weather Forecast
 

To understand the changing climate and make future climate predictions, scientists need to use sophisticated computer models to recreate Earth’s climate conditions. Understanding current rainfall and snowfall variability, among other climate factors on regional and global scales, helps scientists model future behavior of precipitation patterns and climate. But for a system as complicated as the Earth, the models are only as good as the data provided. Satellite precipitation measurements from GPM and its predecessor TRMM provide global scale observational data sets that are comprehensive and consistent over long time periods, two characteristics scientists need to understand the relationships between different parts of the climate system. Specifically, organizations use GPM and TRMM data as input to verify and validate their seasonal and climate model simulations. The ultimate goal is to be able to predict changes in climate on time scales as short as the next hurricane season and as far into the future as changes that may occur in the coming decades or centuries. 

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Snowpack in the Absaroka Range

Climate change may lead to an increase in temperatures and a decrease in snowpack within the Absaroka Range, found at the eastern edge of Yellowstone National Park. Credit: National Park Service/Neal Herbert
 

Precipitation is the fundamental driver of land surface hydrological processes and a key component of the terrestrial water cycle, which in turn affects the functioning of atmospheric and climate processes. High-resolution modeling of land surface hydrological processes requires detailed rainfall estimates as inputs to improve understanding of the state of the water cycle and impacts on land-surface processes during extreme events. Satellite precipitation data from GPM is integrated into land surface models to study surface features and how they change due to manmade and natural conditions such as urbanization and erosion. The use of GPM precipitation data together with other satellite data including soil moisture within land surface models will improve weather and hydrological prediction, which will help city planners and even decision makers save lives. 

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2002

Hurricane Loke Viewed By GPM

Hurricane Loke Viewed By GPM
This year the Eastern Pacific Ocean continues to spawn significant tropical cyclones. Hurricane Loke formed southwest of the Hawaiian Islands on August 21, 2015 but Loke has not been a threat to Hawaii because it intensified to hurricane strength while moving well west of Hawaii over the open waters of the Pacific Ocean. The GPM core observatory satellite measured precipitation within the hurricane as it flew above the most powerful storms in the hurricane on August 2015 at 0116 UTC. GPM's Dual-Frequency Precipitation Radar (DPR) measured rain falling at over 160 mm (6.3 inches) per hour in

Tropical Depression Twelve Upgraded To Tropical Storm Ignacio

Tropical Depression Twelve Upgraded To Tropical Storm Ignacio
Today tropical Storm Ignacio became the 16th 2015 tropical cyclone to form in the eastern Pacific this year putting it a couple weeks ahead of last year’s pace. The GPM core observatory satellite saw Ignacio on August 25, 2015 at 2256 UTC. GPM’s Dual-Frequency Precipitation Radar (DPR) found rain falling at a rate of over 74 mm (2.9 inches) per hour with storm tops reaching to altitudes of close to 15 km (8.7 miles).

GPM Sees Energetic Tropical Depression Kilo

GPM Sees Energetic Tropical Depression Kilo
Rainfall associated with tropical depression Kilo recently dumped heavy rain in some areas of the state of Hawaii. Tropical depression Kilo changed course to move away from the Hawaiian Islands so it is no longer a threat but has recently been more energetic. The GPM core observatory satellite flew over on August 25, 2015 at 0121 UTC as Kilo approached Johnson Atoll and found that rainfall intensity had recently increased and the tropical depression's storm tops were very tall. GPM's Dual-Frequency Precipitation Radar (DPR) discovered that rain was falling at a rate of almost 65 mm (2.6 inches

Tropical Depression Kilo May Be A Problem For Hawaii

Tropical Depression Kilo May Be A Problem For Hawaii
A tropical depression labeled Kilo formed to the southeast of the Hawaiian Islands on August 20, 2015. The tropical cyclone has moved to the southwest of the Islands. The Central Pacific Hurricane Center (CPHC) predicts that Kilo will strengthen into a hurricane as it moves in the general direction of the island of Kauai over the next five days. The GPM core observatory satellite measured the rainfall near Kilo on August 23, 2015 at 0131 UTC. GPM’s Microwave Imager (GMI) and GPM's Dual-Frequency Precipitation Radar (DPR) discovered that rain was falling at a rate of over 121 mm (4.8 inches)

Powerful Typhoon Goni Brushing The Philippines

Powerful Typhoon Goni Brushing The Philippines
Rain bands from typhoon Goni were hitting the island of Luzon in the northern Philippines when the GPM core observatory satellite flew over on August 20, 2015 at 0711 UTC (3:11 PM Philippine Standard Time). GPM's Microwave Imager (GMI) clearly showed the intensity of rain falling in Goni's inner and replacement outer eye wall. GMI found that precipitation was falling at a rate of over 88.0 (3.5 inches) in extreme rainfall south of Goni's distinct eye. Radar reflectivity data from GPM's Dual-Frequency Precipitation Radar (DPR) instrument was used in this view (from the east) to show the 3-D
A Decade of Global Precipitation

Through rain and snow, hurricane, typhoon and monsoon, flash flood and bomb cyclone, for ten years, the joint NASA-JAXA Global Precipitation Measurement mission has measured a lot of water. GPM’s Core Observatory satellite launched from Tanegashima Space Center in Japan in early 2014, becoming the first satellite to be able to see through the clouds and measure liquid and frozen precipitation from the Equator to polar regions using a radar. Now in its tenth year of operation, we look at ten events brought to light by this groundbreaking mission. Credits: NASA's Goddard Space Flight Center

NASA’s New View of the Daily Cycle of Rain

The most detailed view of our daily weather has been created using NASA's newest extended precipitation record known as the Integrated Multi-satellitE Retrievals for GPM, or IMERG analysis. The IMERG analysis combines almost 20 years of rain and snow data from the Tropical Rainfall Measuring Mission (TRMM) and the joint NASA-JAXA Global Precipitation Measurement mission (GPM). The daily cycle of weather, also known as the diurnal cycle, shapes how and when our weather develops and is fundamental to regulating our climate.

Music Credits: "Battle For Our Future" and "Wonderful Orbit" by Tom...

NASA Studies Snow At The Winter Olympics

NASA engineer Manuel Vega can see one of the Olympic ski jump towers from the rooftop of the South Korean weather office where he is stationed. Vega is not watching skiers take flight, preparing for the 2018 PyeongChang Winter Olympics and Paralympic games. Instead, he’s inspecting the SUV-sized radar beside him. The instrument is one 11 NASA instruments specially transported to the Olympics to measure the quantity and type of snow falling on the slopes, tracks and halfpipes. NASA will make these observations as one of 20 agencies from eleven countries in the Republic of Korea as participants...

A New Multi-dimensional View of a Hurricane

NASA researchers now can use a combination of satellite observations to re-create multi-dimensional pictures of hurricanes and other major storms in order to study complex atmospheric interactions. In this video, they applied those techniques to Hurricane Matthew. When it occurred in the fall of 2016, Matthew was the first Category 5 Atlantic hurricane in almost ten years. Its torrential rains and winds caused significant damage and loss of life as it coursed through the Caribbean and up along the southern U.S. coast. 

Music: "Buoys," Donn Wilkerson, Killer Tracks; "Late Night Drive," Donn...

Getting Flake-y: Why All Snowflakes Have Six Sides
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NASA scientists can measure the size and shape distribution of snow particles, layer by layer, in a storm. The Global Precipitation Measurement mission is an international satellite project that provides next-generation observations of rain and snow worldwide every three hours.

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