cloudsat precipitation

Database of Cyclones with CloudSat 2C-PRECIP-COLUMN Observations. Found inside – Page 38showed similar agreement with CloudSat for Antarctic precipitation, several studies suggest that GPCP over estimates precipitation in parts of Eurasia, ... This is information that we did not know before, principally because many regions on Earth are not instrumented on the ground to obtain this information, such as over the oceans and over sparsely-populated land areas such as the polar regions. What does CloudSat reveal about global land precipitation detection by other... Behrangi, A., Y. Tian, B. Lambrigtsen, and G. Stephens (2014), What does CloudSat reveal about global land precipitation detection by other spaceborne sensors?, Water Resour. The backscatter of radar data due to presence of hydrometeors near the surface confirms the occurrence of rain. Found inside – Page 16There are several CloudSat products available from the CloudSat science team. Among them, the cloud scenario classification (2B-CLDCLASS) and Precipitation ... Estimates of precipitation incidence from the in situ W-band are computed using the near-surface Z with the same thresholds as the CloudSat 2C-PRECIP-COLUMN precipitation incidence flag indicated in table 1. Since the sampling interval is 0.16 seconds, the satellite moves 1.1 km relative to the Earth’s surface during this time. Although there are only 32 overpasses of the earth each day, CloudSat has made seven eye hits of hurricanes and seven eye wall grazes. CloudSat appear very similar showing maxima in regions of persistent large-scale convergence and minima in several well-defined subsidence regions. A simulator package utilizing a model-to-satellite approach facilitates … Precipitation Rate 2C-PRECIP-COLUMN CloudSat 1.4km×2.5km Table 2. The factors complicating the comparison are the time mismatch, the differences in sensitivity, and the changes to the geometry of cross section with range from the ground radar, W band … In turn, global observations of precipitation are most efficiently made from space. Learn more about the LPVEx field campaign, GPM and Cloudsat Researchers Meet in Helsinki to Discuss LPVEx Data, about GPM and Cloudsat Researchers Meet in Helsinki to Discuss LPVEx Data, CloudSat-GPM Coincidence Dataset Version 1C, NASA GPM/PMM Participation in the Canadian Cloudsat / Calipso Validation Project (C3VP): Physical Process Studies in Snow. CloudSat has provided the first quantitative estimate of global snowfall. CloudSat has determined how clouds heat or cool the atmosphere. ness produce precipitation that falls to the ground. Figure 3: (a) Frequency of occurrence of rain, mixed precipitation, and snowfall from CloudSat observations. Found inside – Page 2Surface Energy Fluxes , focusing on precipitation data from TRMM and CloudSat He discussed differences between his calculated energy budget with sensible ... In this manuscript, the use of near-coincident observations between GPM and the CloudSat Profiling Radar (CPR) (W-band, or 94 GHz) are … The radar data produces detailed images of cloud structures which will contribute to a better understanding of clouds and climate. Owing to the Global Precipitation Measurement (GPM) core satellite’s unique asynchronous orbit, its orbital ground tracks intersect the orbital tracks of many other sun-synchronous satellites. When CloudSat correctly detects the occurrence of precipitation, it shows uniformly high POD (>80%) and low FAR (<10%) for classifying the phase of precipitation. The new mission, called the Genesis and Rapid Intensification Processes mission, or GRIP, conducts field studies for 6 weeks starting on August 15, 2010. The analysis shows that no more than 50% of the tropical (40 S–40 N) precipitation occurrence is captured by the current suite of precipitation measuring sensors. Since the sampling interval is 0.16 seconds, the satellite moves … and because the Cloudsat precipitation retrievals have not been extensively tested, we will depict the precipitation rate as being either light (< 1 mm h–1), moderate (1–5 mm h–1), or heavy (> 5 mm h–1). Note that due to the challenges of obtaining reliable path-integrated attenuation over land and ice surfaces, CloudSat products estimate liquid phase precipitation only over open ocean, while solid phase precipitation is estimated over all surface types. In this work, the precipitation detection performance of a suite of precipitation sensors, commonly used in generating the merged precipitation products, are investigated. In a series of maneuvers, CloudSat and CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) join three satellites already in orbit (Aqua, PARASOL, and Aura) to form a constellation of weather- and climate-tracking satellites known as the A-Train. CloudSat, CALIPSO, Eureka combined to lab experiments Since precipitation is cloud dependent, all of … CloudSat along with CALIPSO, Aqua, PARASOL, and Aura form a satellite constellation known as the A-Train. This increased sensitivity allows us to see inside the large cloud masses that make our weather. Thus ground-based precipitation occurrence records will provide a critical role in assessing CloudSat algorithm’s capture of the cloud to precipitation transition. Found inside – Page 35These are mainly the launch and operation of CloudSat (Stephens 2008), the Global Precipitation Measurement (GPM) mission (Skofronick-Jackson et al. A complete understanding of the Earth’s hydrologic cycle necessarily dictates an ability to accurately quantify the global range of precipitation rates and types (rain, snow etc.). In addition, auxiliary data such as infrared brightness temperature, surface air temperature, and cloud types were used for a more detailed assessment. A new satellite-based cloud experiment, hereafter the CloudSat mission, aims to provide observations necessary to advance our understanding of these is-sues. The Arctic Observation and Reanalysis Integrated System is a merged database containing a suite of satellite, reanalysis, and in situ products. The LPVEx field campaign was designed to make Found inside – Page 10Full vertical profiles of clouds and light and solid precipitation are being observed by CloudSat [http:// cloudsat.atmos.colostate.edu ... Then the vertical structures, geographical distributions, and seasonal variations of cloud and precipitation near the two CloudSat overpass times are generated from 9 years of For 49 this reason, the CloudSat-CPR’s actual ability to document WMBL … observations from the NASA CloudSat mission, which uses a near nadir-pointing millimeter-wavelength radar to probe the vertical structure of clouds and precipitation. This means there are about 14.6 complete revolutions around the Earth per day. An additional and fundamental limitation of CloudSat as a precipitation sensor is that it suffers from surface clutter contamination in CloudSat has provided unique insight into the effect of cloudiness on the acceleration of polar and Greenland ice melting. Therefore, we allow for the possibility of mixed-phase clouds at temperature levels between 2208 and 08C by imposing a precipitation mix- ture of ice (98%) and water (2%) between these two levels. Found inside – Page 495CloudSat will fly a millimeter - wave ( 94 GHz ) radar that is capable of seeing a large fraction of clouds and precipitation , from very thin cirtus clouds ... Found inside – Page 527CloudSat will also fly for the first time in space a milli - meter wave radar that is capable of seeing practically all clouds and precipitation , from very ... Precipitation Rate 2C-PRECIP-COLUMN CloudSat 1.4km×2.5km Table 2. In the Cloudsat data, the darkest blues represent areas where clouds and raindrops reflected the strongest signal back to the satellite radar. CloudSat’s radar sends a series of short pulses of microwave energy down through the atmosphere, and a fraction of these return to the satellite. The Global Precipitation Measurement (GPM) Dual-Frequency Precipitation Radar (DPR) (Ku-and Ka-band, or 14 and 35 GHz) provides the capability to resolve the precipitation structure under moderate to heavy precipitation conditions. In this chapter, the CloudSat precipitation occurrence is used as a reliable source for rain detection. 126 [ Missions: CloudSat ] Earth Science Reference Handbook other cloud properties, including precipitation and cloud optical properties. Among the mission's many science accomplishments to date, CloudSat has provided the capability to look jointly at clouds and at the precipitation that comes from them, spotlighting flaws in climate model physics: models produce precipitation too frequently, and the modeled precipitation is lighter than actual observations. CloudSat is a satellite mission designed to measure the vertical structure of clouds from space. The cloud profiling radar (CPR) on CloudSat [Imetal.,2006]isthefirstspacebornemillimeter‐wavelength CloudSat-GPM Coincidence Dataset Version 1C. 2010. In … The ability of CloudSat to detect precipitation in cold season cloud systems is examined using data from the Environment Canada C band weather radar at King City, Ontario. Measure profiles of cloud optical properties: These mea-surements, when combined with water and ice content information, provide critical tests of key cloud process Found inside – Page 110110110 CHAPTER 4 CHAPTER 4 FIGURE 4.51 Precipitation in Hurricane Arthur as ... Launched in 2006, the NASA CloudSat satellite circles Earth in an orbit ... The capability of CloudSat to provide information on seasonal and subseasonal time scales, however, has yet to be explored. the CloudSat and CALIPSO satellites, flying in the A‐Train constellation [Stephens et al., 2002], provide the first global survey of the vertical distribution of cloud condensate and precipitation. These areas had the heaviest precipitation and … Found inside – Page 118... and estimates how efficiently the atmosphere produces rain from condensates . CloudSat is collecting information about the vertical structure of clouds ... Found inside – Page 20811.6.3 COMPARISON OF AMP - 3 RETRIEVALS WITH CLOUDSAT RADAR OBSERVATIONS 11.6.5 COMPARISON OF AMP - 3 RETRIEVALS WITH GLOBAL RAIN. Also evident are the strong bands of precipitation associated with the storm tracks and frequent snow events off the Antarctic coast. precipitation occurrence at 0130 and 1330 LT and the 24 h mean are quantitatively evaluated using climatologies of diurnal variation from 9 years of TRMM observations. CloudSat has given scientists a deeper understanding of how pollution, volcanic emissions and other atmospheric 'aerosols' interact with clouds to affect precipitation and cloud lifetime. Found inside – Page 646CloudSat will fly a millimeter - wave ( 94 GHz ) radar that is capable of seeing a large fraction of clouds and precipitation , from very thin cirrus clouds ... It is important to accurately capture those characteristics to understand and model the current state of the Earth’s climate and predict future changes. Document Description. 2008) is greater than 30. Found inside – Page 46Another Year of PR and TMI Data for Enhancing Near-Real-Time Rainfall ... Anticipated Research Contributions Overlap with CloudSat Radar Operations and the ... Found inside – Page 278Variations of this method have been used to obtain PIA estimates for use in the TRMM rain-profiling algorithm (Meneghini et al., 2000), CloudSat's rain ... 50 2002) and hosts a W-band radar (DPR). The ability of CloudSat s millimeter-wavelength Cloud Profiling Radar (CPR) to profile not only cloud particles but also light precipitation brings some hope to the above problems. CloudSat is sensitive to both cloud and pre-cipitation sized liquid and ice particles. Visit https://espo.nasa.gov for information about our current projects. For 49 this reason, the CloudSat-CPR’s actual ability to document WMBL clouds and precipitation remains uncertain. produce precipitation. Found inside – Page 196The ESA EarthCare mission is to include a similar radar to CloudSat but with ... to approximately 20 dBZ in heavier precipitation (Stephens et al. 2002). Read "CloudSat Studies of Stratiform Precipitation Systems Observed in the Vicinity of the Southern Great Plains Atmospheric Radiation Measurement Site, Journal of Applied Meteorology and Climatology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Figure 3: (a) Frequency of occurrence of rain, mixed precipitation, and snowfall from CloudSat observations. Found insideLiu, G. (2008), Deriving snow cloud characteristics from CloudSat observations, J. Geophys. Res., 113, DO0A09, doi: 10.1029/2007JD009766 ... Water resources management 24 (6), 1229-1249. , 2010. Iguchi T … 2009), offering detection of precipitation over land and ocean (Smalley et al. CloudSat has revealed how much ice and water are contained in clouds globally. The Canadian CloudSat/CALIPSO Validation Project (C3VP) was an collaborative international field campaign that took place in … Found inside – Page 171Measurements of precipitation are also possible with remote sensing methods using high frequency radars used to profile clouds, such as CloudSat. Found inside – Page 495CloudSat will fly a millimeter - wave ( 94 GHz ) radar that is capable of seeing a large fraction of clouds and precipitation , from very thin cirrus clouds ... CloudSat is studying clouds in detail to better characterize the role they play in regulating Earth's climate. Found inside – Page 23The recent CloudSat and TRMM (Tropical Rainfall Measuring Mission) satellites carry on-board radars that provide the vertical cross-sectional structure of ... Large databases of coincident ground and satellite measurements allow us to provide a new estimate of around 9% for the frequency of virga events, a factor of two smaller than a previous estimate for the Arctic. Found inside – Page 33The CloudSat project produces three precipitation data products. The first is a precipitation identification and classification algorithm called ... Found inside(Bottom) CloudSat vertical radar profile through Super Typhoon Choi-Wan. ... sensed by the Global Precipitation Measurement (GPM) satellite on July 3, 2014, ... Orbital elements (two-line elements or TLEs) for CloudSat are available here (CloudSat DPC the Canadian C-band radar network; J. Ge ophys. Found inside – Page 140With its launch in 1997, the long-lived TRMM (TropicalT Rainfall ... Launched in 2006, the satellite CloudSat circles Earth in an orbitabout 700 km above ... Most notably, CloudSat data suggest that precipitation is significantly less frequent in the mid-latitude storm tracks than indicated by the AMSR-E. Poleward of 50 latitude, a combination of various factors such as an abundance of light rainfall, snowfall, shallow precipitation-bearing clouds, and frozen surfaces reduces the space-based precipitation detection rate to less than 20%. Definitions of warm and cold base mixed-phase clouds and liquid clouds in this study. Found inside – Page 197CPR profiles of Ze of clouds and precipitation are reported at every 1.1km along the track. The minimum detectable signal of CloudSat is about 30 dBZ. precipitation algorithm, and vertical sampling issues. Found inside – Page 124In orbit since 1997, the Precipitation Radar (PR) on the Tropical Rainfall ... Launched in April 2006, CloudSat is the first millimeter wavelength cloud ... More information about the GPM mission is available on the Precipitation Measurement Mission (PMM) Ground Validation webpage. [1] The combined CloudSat and CALIPSO satellite observations provide the first simultaneous measurements of cloud and precipitation vertical structure and are used to examine the representation of tropical clouds and precipitation in the Community Atmosphere Model version 3 (CAM3). Found inside – Page 145... true for estimating precipitation from space. Three main satellite estimates can be used to quantify this variable: CHIRPS, GPM-IMERG and CloudSat. CloudSat, the first satellite carrying a 94 GHz Cloud Profiling Radar (CPR), provides the opportunity for us to identify the onset of precipitation on global scale. Definitions of warm and cold base mixed-phase clouds and liquid clouds in this study. Found inside – Page 45The CloudSat mission flies the first millimeter-wavelength radar system that observes both clouds and precipitation. CloudSat flies in formation with Aqua, ... Found inside – Page 582“The spaceborne 94 GHz radar onboard the CloudSat polar orbiting satellite ... precipitation with estimated rain rates in a range of about 3-12 mm h(1). The missed precipitation is then propagated into the merged precipitation products that are widely used. Found inside – Page 24... Validation of rain/no-rain threshold value of cloud liquid water for microwave precipitation retrieval algorithm using CloudSat precipitation product, ... Found inside – Page 237(2009) compare rain frequency derived from the CloudSat radar for the period 2006—2007 and found that the CloudSat rain frequency is quite consistent with ... the calibration of the CloudSat reflectivity measurements is accurate within 0.5–1dB (Li et al., 2005; Tanelli et al., 2008). CloudSat’s radar sends a series of short pulses of microwave energy down through the atmosphere, and a fraction of these return to the satellite. 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