With Giovanni and a few mouse clicks, one can easily obtain information on the atmosphere around the world.

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GES-DISC Interactive Online Visualization ANd
aNalysis Infrastructure (Giovanni)

• With Giovanni and a few mouse clicks, one can
  easily obtain information on the atmosphere
  around the world.
• There is need to learn data formats to retrieve
  and process data.
• You can try various combinations of parameters
  measured by different instruments.
• All the statistical analysis is done via a
  regular web browser.
• http//giovanni.gsfc.nasa.gov/
• Caution Giovanni is a constantly evolving data
  exploration tool!

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Giovanni homepage
Just Google nasa and giovanni
http//giovanni.gsfc.nasa.gov
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What is Giovanni?
Data Inputs
MLS Aura
Area Plot
Time Series
Model Output
OMI Aura
AIRS Aqua
MODIS Aqua
MODIS Terra
Giovanni Instances
SeaWiFS
C
B
A
TRMM
B
HALOE UARS
A
C
E
TOMS EP, N7
C
F
AMSR-E Aqua
D
MISR Terra
D
E
F
CloudSat
CALIOP CALIPSO
MERRA Models
Profile Cross-Section
Correlations
Column Densities
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Giovanni Capabilities

• Basic (one-parameter)
• Area plot averaged or accumulated over any data
  period for any rectangular area (various map
  projections)
• Time plot time series averaged over any
  rectangular area
• Hovmöller plots longitude-time or latitude-time
  cross sections
• ASCII output for all plot types (can be used
  with GIS apps, spreadsheets, etc.)
• Image animation for area plot
• Vertical profiles
• Vertical cross-sections, zonal means
• Beyond basics
• Area plot - geographical intercomparison between
  two parameters
• Time plot - an X-Y time series plot of several
  parameters
• Scatter plot of parameters in selected area and
  time period
• Scatter plot of area averaged parameters -
  regional (i.e., spatially averaged) relationship
  between two parameters
• Temporal correlation map - relationship between
  two parameters at each grid
• Temporal correlation of area averaged parameters
  - a single value of the correlation coefficient
  of a pair of selected parameters
• Difference plots
• Anomaly plots
• Acquiring parameter and spatial subsets in a
  batch mode through Giovanni

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Satellite, Model, and Ground Based Data in
Giovanni
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Precipitation Measurements
TRMM Tropical Rainfall Measuring Mission (Dec
1997 - ) A joint mission between NASA and the
Japan Aerospace Exploration Agency (JAXA) GPCP
Global Precipitation Climate Project (1979 - )
Multi-sensor merged precipitation
Summer
Winter
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Air Temperatures Measurements

• AIRS/Aqua Atmosphere InfraRed Sounder (May 2002
  -)
• Atmospheric temperature profiles
• Surface air temperature
• Tropopause temperature
• MODIS/Aqua Moderate Resolution Imaging
  Spectroradiometer (May 2002 -)
• temperature profile
• MLS/UARS Microwave Limb Sounder (1991-1999)
• upper tropospheric temperature
• MLS/Aura Microwave Limb Sounder (MLS) (Aug 2004
  -)
• temperature profile
• HIRDLS/Aura High resolution Dynamic Limb Sounder
  (Jan 2005 -)
• temperature profiles

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Geopotential Height Measurements
Nov 2008, 200 hPa
AIRS/Aqua Atmosphere InfraRed Sounder (May 2002
-) MLS/UARS Microwave Limb Sounder (1991-1999)
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Wind Measurements

• QuikSCAT Quick Scatterometer (Jun 1999)
• sea surface wind velocity
• sea surface wind direction
• WIND II/UARS Wind Imaging Interferometer
  (1991-1997)
• upper atmosphere winds (above 80km)

8/26-27/2005
8/29-30/2005
Winds and precipitation of Hurricane Katrina
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Atmospheric Water Vapor Measurements

• AIRS/Aqua Atmosphere InfraRed Sounder (May 2002
  -)
• Total integrated water vapor
• Precipitable water
• Relative humidity, Water vapor mixing ratio
• MLS/Aura Microwave Limb Sounder (Jul 2004 -)
• mixing ratio of water vapor, Relative humidity
• ice water content
• MODIS/Terra, MODIS/Aqua Moderate Resolution
  Imaging Spectroradiometer (Terra Dec 1999 -,
  Aqua May 2002 -)
• water vapor clear sky / cloudy
• TRMM Tropical Rainfall Measuring Mission (Dec
  1997 - )
• precipitable water
• MLS/UARS Microwave Limb Sounder (1991-1999)
• upper troposphere relative humidity

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Cloud Property Measurements

• AIRS/Aqua Atmosphere InfraRed Sounder (May 2002)
• Cloud fraction
• Cloud top temperature and pressure
• Total integrated column cloud liquid water
• MODIS/Terra, MODIS/Aqua Moderate Resolution
  Imaging Spectroradiometer (Terra Dec 1999,
  Aqua May 2002)
• cloud fraction , cloud optical depth
• cloud top temperature/pressure
• cloud water path
• HIRDLS/Aura High resolution Dynamic Limb Sounder
  (Jan 2005)
• cloud top pressure
• OMI/Aura Ozone Monitoring Instruments (Jul 2004)
• Cloud pressure and cloud fraction
• MLS/Aura Microwave Limb Sounder (MLS) (Aug 2004)
• ice water content

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Radiation Measurements

• AIRS/Aqua Atmosphere InfraRed Sounder (May 2002)
• Outgoing longwave radiation
• Infrared surface emissivity
• OMI/Aura Ozone Monitoring Instruments (Jul 2004)
• UVB irradiance
• SUSIM/UARS Solar Ultraviolet Spectral Irradiance
  Monitor (1991-2005)
• ultraviolet radiation
• SORCE Solar Radiation and Climate Experiment
  (Feb 2003)
• total solar irradiance
• solar spectral irradiance

AIRS OLR Nov 2008
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Atmospheric Aerosols Measurements

• OMI/Aura Ozone Monitoring Instruments (Jul 2004)
• Near-UV aerosol extinction and absorption
  optical depth
• multi-wavelength aerosol optical depth
• MODIS/Terra, MODIS/Aqua Moderate Resolution
  Imaging Spectroradiometer (Terra Dec 1999,
  Aqua May 2002)
• aerosol optical depth at 550 nm
• aerosol small mode fraction and optical depth
• Angstrom 470/660 nm (land) and 550/865 nm
  (ocean)
• TOMS Total Ozone Mapping Spectroradiometer
  (1978-2003)
• HALOE/UARS HALogen Occultation Experiment
  (1991-2005)
• MISR/Terra Multi-angle Imaging SpectroRadiometer
  (Dec 1999)
• SeaWiFS/OrbView-2 Sea-viewing Wide Field-of-view
  Sensor ( Sep 1997)
• aerosol optical thickness at 865 nm (ocean only)

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Ozone Measurements

• TOMS Total Ozone Mapping Spectrometer
  (1978-2003)
• HALOE/UARS HALogen Occutlation Experiment
  (1991-2005)
• AIRS/Aqua Atmosphere InfraRed Sounder (May 2002
  -)
• OMI/Aura Ozone Monitoring Instrument (Jul 2004
  -)
• MLS/Aura Microwave Limb Sounder (Jul 2004 - )
• HIRDLS/Aura High Resolution Dynamics Limb
  Sounder (Jul 2004 -)
• vertical profile of ozone

OMI Ozone Oct 2008
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Atmospheric Trace Gases Measurements

• AIRS/Aqua Atmosphere InfraRed Sounder (May 2002)
• Total column CO
• Effective CO volume mixing ratio for 7 layers
• Effective CH4 volume mixing ratio for 3 layers
• OMI/Aura Ozone Monitoring Instruments (Jul 2004)
• Total and tropospheric NO2
• Total column SO2
• MLS/Aura Microwave Limb Sounder (Jul 2004)
• mixing ratio of SO2, N2O, CO, Bro, CH3CN, CIO,
• HIRDLS/Aura High Resolution Dynamics Limb
  Sounder (Jul 2004)
• vertical profile of HNO3, CFC-11, CFC-12
• HALOE/UARS HALogen Occultation Experiment
  (1991-2005)
• concentration methane, and nitrogen family
• MLS/UARS Microwave Limb Sounder (1991-1999)

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Ocean Measurements

• SeaWiFS/OrbView-2 Sea-viewing Wide Field-of-view
  Sensor (Sep 1997 -)
• chlorophyll a concentration
• diffuse attenuation coefficient at 490 nm
• normalized water-leaving radiance at 412, 443,
  490, 510, 555, 670nm
• MODIS/Aqua Moderate Resolution Imaging
  Spectroradiometer (Jul 2002 -)
• chlorophyll a concentration
• diffuse attenuation coefficient at 490 nm
• normalized water-leaving radiance at 412, 443,
  488, 531, 551, 667nm
• SST at 4, 11 micron

SeaWiFS Chl a Aug-Sep 2008
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Land Surface and Cryosphere Data

• Fire MODIS/Terra, MODIS/Aqua
• Vegetation Index MODIS/Terra, MODIS/Aqua
• Soil Moisture AMSR-E
• Snow/Ice NESDIS/IMS

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Model Data
MERRA MODERN ERA RETROSPECTIVE-ANALYSIS FOR
RESEARCH AND APPLICATIONS (1979 2008) NASA
reanalysis of atmospheric observations from using
GEOS-5, focusing on hydrological cycle,
resolution 1/2x2/3x72 GOCART Goddard Chemistry
Aerosol Radiation and Transport (2000-2006)
simulates tropospheric aerosols HemTAP
Intercomparisons of 40 Air Quality Models (2001-)
(coming soon) GLDAS 4 Land Surface Models
(1979 - )(coming soon)
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NASA MERRA Reanalysis Products
Two new Giovanni instances supporting the
recently released 30 years (1979-2008) Modern
Era-Retrospective-analysis for Research and
Applications (MERRA), the NASA reanalysis for the
satellite era using GEOS-5, focusing on
historical analyses of the hydrological cycle on
a broad range of weather and climate time scales.
Annual mean total surface precipitation of year
1980 over northern America.
Zonal averaged vertical cross section map for air
temperature in Jul 1999.
Cloud top pressure of Jan 1999
Ozone mixing ratio at upper atmosphere 850 hPa
(upper panel) in Dec 1999.
Wind vertical profiles over an area (80o W
85oW, 33oN-38oN) for U component (left panel) and
V component (right panel) in July 1980.
Northern hemisphere snow mass in Dec 1999
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Giovanni Provides Comparisons Of Observations
and Model
Map of the Differences between Model and
Observations
Overlay of Contours of one parameter over 2D
colored map of another parameter
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Long-Range Transport of Smoke and Dust Aerosols
OMI Absorption Aerosol Optical Depth July 2007
Aerosol Index Time-Longitude Map Transport of
African Dust West to East
Dust
Smoke
The global map of July 2007 OMI Absorption
Optical Depth (on the left) shows North African
dust traveling westward over the Atlantic Ocean
and reaching Mexico and North America. It also
shows smoke plumes from the biomass burning from
central Africa. The Aerosol Index map on the
right shows westward transport of North African
dust plumes with time. The dust plume which
lifted above ground on June 6 at 20 deg E reached
Gulf of Mexico in two weeks. Aerosol index is a
very good indicator of absorbing aerosols such as
smoke and dust.
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OMI can see UV absorbing Aerosols (dust smoke)
over clouds
Asian dust plumes usually start in March and
mainly build up over Taklamakan and Gobi deserts
and move eastwards, travel over the Pacific and
reach the west coast of America. On the right,
the map of OMI Aerosol Index of April 7, 2005
shows dust plume over East China, Korea and Japan.
Dust Plumes Over Cloud
On the left is shown Plumes of smoke from a
Canadian Boreal Forest Fire for August 16,
2005 These Aerosol index maps have been overlaid
on OMI retrieved Cloud Cover to show that OMI can
detect aerosols even over clouds.
Smokes Over cloud
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Stratospheric Ozone Contribution to Tropospheric
Ozone
OMI Ozone Column Amount
AIRS Temperature (Pressure-Time Cross Section)
AIRS Relative Humidity (Pressure-Latitude Cross
Section)
Intrusion
AIRS Ozone Column Amount
AIRS Temperature (300mb)
AIRS Relative Humidity (Pressure-Time Cross
Section)
Stratosphere-Troposphere Exchange shown using
OMI AIRS Data, March 26-28, 2005
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Southern California Wildfires
OMI UV Aerosol Index
AIRS Carbon Monoxide (CO)
OMI Tropospheric NO2
MODIS Cloud Optical Thickness
MODIS Small Aerosol Fraction
MODIS Aerosol Mass over Land
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Giovanni Data sources and their access protocols
Data sources Protocol Data
NASA GES DISC Local access AIRS, TRMM, OMI, MLS, HIRDLS
NASA MODIS DAAC FTP MODIS
NASA Ocean Color DAAC FTP SeaWiFS, MODIS
NASA Langley DAAC OPeNDAP CALIPSO, MISR, TES, CERES
NSIDC FTP AMSR-E
NOAA FTP Snow, Ice, NCEP
Univ. of Maryland FTP MODIS fire, NDVI
Colorado State Univ. FTP CloudSat
CIESIN Columbia University FTP Population
JPL FTP QuickSat
EPA via DataFed WCS PM2.5
Lille, France FTP Parasol
ESA FTP MERIS
Juelich, Germany FTP ? WCS HTAP
Paris, France OPeNDAP AEROCOM
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