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Enabling NLDAS-2 Anomaly Analysis Using Giovanni
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Author and Affiliation:
Loeser, Carlee(Adnet Systems, Inc., Greenbelt, MD, United States)
Rui, Hualan(Adnet Systems, Inc., Greenbelt, MD, United States)
Teng, William(Adnet Systems, Inc., Greenbelt, MD, United States)
Vollmer, Bruce(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Mocko, David(Science Applications International Corp., Greenbelt, MD, United States)
Abstract: A newly implemented feature in Giovanni (GES DISC Interactive Online Visualization and Analysis Interface) allows users to explore and visualize anomaly data from the NLDAS-2 Primary Forcing and Noah model data sets. For a given measurement and location, an anomaly describes how conditions for a particular time period compare to normal conditions, based on long-term averages. Analyzing anomalies is important for monitoring droughts, determining weather trends, and studying land surface processes relevant for meteorology, hydrology, and climate. Using Giovanni to analyze anomalies for NLDAS-2 data allows for these studies to be efficiently conducted for the central North American region. Phase 2 of NLDAS (NLDAS-2) currently runs at an 1/8th degree resolution, in near-real time, with data sets extending back to January 1979. NLDAS-2 provides data for soil moisture, precipitation, temperature, and other hydrology measurements. Hourly, monthly, and 30-year (1980-2009) monthly climatology data are available for several land surface models and forcing data sets. The Giovanni anomaly tool calculates monthly anomalies, for a given user-defined variable, as the difference between the NLDAS-2 monthly climatology data and the monthly data. The resulting anomaly describes how a chosen month compares to the 30-year monthly average. The presentation will demonstrate the capabilities and usefulness of Giovanni's anomaly tool, detail the recently added NLDAS-2 variables for which anomalies are available, and show how users can access the data.
Publication Date: Dec 11, 2017
Document ID:
20170012151
(Acquired Dec 15, 2017)
Subject Category: METEOROLOGY AND CLIMATOLOGY; COMPUTER PROGRAMMING AND SOFTWARE
Report/Patent Number: H21F-1558, GSFC-E-DAA-TN50542
Document Type: Oral/Visual Presentation
Meeting Information: AGU Fall Meeting; 11-15 Dec. 2017; New Orleans, LA; United States
Meeting Sponsor: American Geophysical Union; Washington, DC, United States
Contract/Grant/Task Num: 80GSFC17C0003; NNG15HQ01C
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Public use permitted
NASA Terms: ANOMALIES; CLIMATOLOGY; DROUGHT; EARTH SURFACE; ENVIRONMENT MANAGEMENT; HYDROLOGY; INFORMATION SYSTEMS; METEOROLOGY; REAL TIME OPERATION; WEATHER FORECASTING; ASSIMILATION; ENVIRONMENTAL MONITORING; LAND MANAGEMENT; NORTH AMERICA; POSITION (LOCATION); SCIENTIFIC VISUALIZATION; SOIL MOISTURE
Other Descriptors: NLDAS; ANOMALY; DROUGH
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