PROMOTING PRACTICAL APPLICATIONS OF HIGH ......hydrology applications. Planned strategies to enhance...
Transcript of PROMOTING PRACTICAL APPLICATIONS OF HIGH ......hydrology applications. Planned strategies to enhance...
NASA’s Applied Sciences
Program is supporting a formal
effort to optimize the value of
upcoming NASA Earth missions
to a broad user community and
to society at large. The objective
of the proposed Surface Water
and Ocean Topography (SWOT)
Applications program would be
to pave the way for operational
use of SWOT data products soon
after the mission would launch
in 2020. A wide range of existing
and potential oceanography
applications utilizing current
altimetry data products from the
Jason series and other missions
would be enhanced with the
introduction of high-spatial-
resolution data anticipated to
be gained from the proposed
SWOT mission. With time series
of surface water measurements
www.nasa.gov
National Aeronautics and Space Administration
Surface Water and Ocean Topography Mission*
PROMOTING PRACTICAL APPLICATIONS OF HIGH-RESOLUTION ALTIMETRY MEASUREMENTS
Margaret Srinivasan1
C. Peterson2
E. Rodriguez1
K. Andreadis1
Y. Chao3
D. Moller3
F. Hossain4
1California Institute of Technology, Jet Propulsion Laboratory,
Pasadena, California2MSU Science and Technology Center,
Stennis Space Center, Mississippi
3Remote Sensing Solutions,
Pasadena, CA 4University of Washington,
Seattle, WA
SWOT* Science Goals
Hydrology: First global inventory of fresh water storage and discharge on land.
Oceanography: First global determination of the ocean circulation, kinetic energy and dissipation at mesoscales and submesoscale processes.
For more information: swot.jpl.nasa.gov
AGU Ocean Sciences 2014, Honolulu
anticipated to be provided by
SWOT, a broad range of both
ocean applications may inform
coastal managers and marine
operators on offshore conditions
and currents relevant to their
regions.
Several studies proposed
to highlight the applications
potential of the SWOT* mission
for a broad range of users. These
include 1) the development of
a flood forecasting toolbox,
2) the use of remote sensing
measurements to improve the
understanding, monitoring
and management of estuaries
and deltas, and 3) the use of
simulated SWOT data to assess
the quality and potential value of
anticipated SWOT measurements
to both oceanography and
hydrology applications.
Planned strategies to enhance
science and practical
applications of anticipated
SWOT data include methods
of engaging with the science
community, operational users
and mission planners, and
the establishment of an Early
Adopters Program.
Science Questions Addressed by SWOT*
Hydrology: What is the spatial and temporal variability in the world’s terrestrial surface water storage and how can we predict these variations more accurately?
Oceanography: What is the small-scale (10–100 km) variability of ocean surface topography that determines the velocity of ocean currents, especially the effects of ocean current velocity on the transfers of heat, carbon dioxide and nutrients between the upper and deep ocean?
Abstract
Copyright 2014. All rights reserved.
Multiscale data assimilation from 3DVAR uses SST from multiple satellites, SSV from HF radars, vertical profiles of T/S from three Spray gliders, Argo floats, and ships, and produces 3 km resolution coastal ocean temperature maps. Nowcast data has been provided every 6 hours from September 2010 to present, and daily 72-hour forecasts are produced from 03 UTC. Images; Left top: Observations; satellite SST in color, HF radar surface current in vectors. Left bottom: Observations; glider section. Middle: ROMS with 3-km resolution. Right: SELFE unstructured grid model with variable resolutions from 1km near the Golden Gate bridge to 10m up in the rivers.
Monitoring and Managing Estuaries and Deltas
This proposed project will engage end users in both oceanography and hydrology application areas to demonstrate the potential use of SWOT* data to enable improved decision-making. Simulated SWOT measurements over the San Francisco Bay/Estuary and the Sacramento River will be used to assess the quality and potential value added by SWOT measurements to both oceanography and hydrology applications. The simulated SWOT data will be used to develop application-oriented data sets and value-added products to engage potential end users. (Y. Chao, E. Beighley, D. Moller)
Offline
3-‐km 1-‐km………………..10-‐m
Mul2-‐scale data assimila2on
Flood Forecasting Toolbox
A graphical user interface (GUI) “toolbox” is being developed that will make satellite altimeter data far more accessible and interpretable to a wide range of end users. The toolbox will use altimetry data from the OSTM/Jason-2 satellite to allow the convenient extraction of river heights from the data, and will be usable for other data sets (such as SWOT) in the future. It will have the capability for expanded use in diverse geographic regions for users and stakeholders engaged in water resources management, and will have potential value as a test bed for data from the AirSWOT instrument. The toolbox will be made available to stakeholders such as water supply managers, NGOs, water resources and planning agencies, crop modelers, ecological forecasters, the climate adaptation community, and land management agencies. An immediate application of the toolbox during the project duration will be made by the Flood Management Division of the Institute of Water Modeling-Bangladesh for extending the flood forecasting lead-time to 5+ days using Jason-2 data. (F. Hossain, H. Lee)
Conventional (non-satellite) flood forecasting has a maximum of 3 day lead time to downstream locations due to lack of upstream data. “Real-time” (12 hour delay) Jason-2 data from upstream transboundary regions can extend forecast river levels downstream inside Bangladesh. Upstream information from the Indian region, which takes hours for water to travel to Bangladesh, may extend lead-time to 8 days downstream.
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74° 76° 78° 80° 82° 84° 86° 88° 90° 92° 94° 96° 98°
J2 obs. usedGanges basin
In-situ stationsBrahmaputra basin
J2 ground trackNational boundaries
AirSWOT Applications Demonstration
NASA’s Applied Sciences Program has funded work to develop AirSWOT data products into an accessible format for general users. This project may help define appropriate format and demonstrate applications for high-resolution interferometric data, similar to what would be provided by the proposed NASA-CNES SWOT mission. The research will focus on the use of remote sensing measurements towards the improved understanding, monitoring and management of estuaries and deltas, with particular emphasis on the Sacramento–San Joaquin Delta Estuary. A toolkit will be developed that will convert between the instrument data produced by AirSWOT and data products that will be accessible to a general user community. (E. Rodriguez, K. Andreadis, C. Michailovsky)
Upper; Swath data collected by AirSWOT over the Sacramento-San Joaquin Delta on 5/21/13. Lower; Digital Elevation Model (DEM) for one line of AirSWOT data over the Sacramento-San-Joaquin Delta region, showing the area around one a Delta channel together with Landsat imagery of the surrounding land.
*Proposed Mission - Pre-decisional - for Planning and Discussion Purposes Only