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Release Notes for Giovanni 4.16

Release notes for Giovanni 4.16

Release Notes for Giovanni 4.16 (Released Date: 2015-09-22)

Giovanni 4 is the next generation of Giovanni, designed to be faster, more interactive and easier to learn than its predecessor.

New Features

  • Cross-Map Plot (3 types):
    • Latitude vs Altitude or Longitude vs Altitude: This service creates a two-dimensional representation of data parameter values plotted in pressure or altitude (in the vertical dimension) vs. latitude or longitude (in the horizontal dimension).
    • Time vs Pressure: This service creates a two-dimensional representation of data parameter values plotted in pressure or altitude (in the vertical dimension) vs. time (in the horizontal dimension).
  • Histogram with Log Scale: The Histogram service allows log-scale as a plot option.
  • KMZ Download: The Time Averaged Map service now has a KMZ download option.
  • Zonal Mean Plot: The Zonal Mean Plot is a sequence of data generated by taking the average over a range of longitudes for each latitude.

New Data Variables

  • GLDAS_NOAH10 variables Version 2.0 (total of 120 variables)
  • Several MERRA variables Version 5.2.0 (total of 85 variables)
  • More variables from North American Land Data Assimilation System (NLDAS) Version 2 (total of 288 variables)
  • NASA Ocean Biogeochemical Model (NOBM) sea ice cover Version 2014 (total of 18 variables)

New Features in 4.15 

  • Ad-hoc Palette/Legend Selection: After creating a map, users may now select from the Map Options Dialog the "View All Palettes" button. This will bring up the Palette Options Dialog whereby the user may choose to apply any of the available palettes not just the pre-configured ones.

New Data Variables in 4.15

  • More variables from North American Land Data Assimilation System (NLDAS) Version 1 and 2.
  • Variables from MODIS Aqua Version 6
  • LPRM_AMSRE_A_SOILM3 variables Version 002
  • Several MERRA variables Version 5.2.0

New Features in 4.14

  • Units Column: The variable table has a new column containing each variable's units.
  • Units Conversion: Selected variables can now be converted to new units as part of the workflow computation. Variables with this option have a pull down units selection menu in the units column of the variable table. Units conversion is available for services, with the exception of correlation because the correlation values do not change even if the units change.
  • Plot Labels: The titles, subtitles, axis titles, and other plot decorations have been updated for certain plots to make them more consistent across different kinds of plots.

New Data Variables in 4.14

  • Variables from North American Land Data Assimilation System (NLDAS) Version 2.
  • Variables from NASA Ocean Biogeochemical Model (NOBM) Version 2014.
  • Variables from Total Ozone Mapping Spectrometer (TOMS) including TOM-EP, TOM-Meteor 3 and TOM-Nimbus 7.
  • Variables from Modern Era Retrospective Analysis for Research and Publications (MERRA) Version 5.2.0.
  • Variable from Atmospheric Infrared Sounder (AIRS) Version 6.
  • Variables from Sea-Viewing Wide Field-of-View Sensor (SeaWIFS) Deep Blue Aerosol Climatology.
  • Variables from Tropical Rainfall Measuring Mission (TRMM): TRMM_3B42_Daily_V6, TRMM_3B42_Daily_V7, TRMM_3B43_V6,TRMM_3B43_V7, TRMM_3A12_V7, and TRMM_3B42RT_Daily_V7.

New Features in Giovanni 4.13

  • Accumulation maps computed over shapes:  Compute accumulation maps of precipitation over shapes, such as countries or states.
  • Support for watershed basin shapes: Calculate histograms, area-averaged time series, time-averaged maps, and accumulation maps over major watershed basins.

New Data Variables

  • Precomputed climatologies

Additional notes 

  • Hovmoller visualizations are now rendered by GrADS, and scatterplots by GnuPlot
  • Shapes for countries now use a dataset from the U.S. State Department.
  • Limitations on request size are now computed based on total number of points (formerly timesteps), allowing for longer time ranges to be used if the region of interest is narrowed appropriately.

New Features in Giovanni 4.12

  • Time-averaged maps computed over shapes:  Compute time averages over shapes, such as countries or states.
  • Histogram computed over shapes: Calculate histogram over shapes, such as countries or states.

New Data Variables coming soon to Giovanni 4.12

  • Variables from the Integrated Multi-Satellite Retrievals for GPM (IMERG)
  • Variables from the Physical Oceanography Distributed Active Archive Center (PO.DAAC), and MODIS Adaptive Processing System (MODAPS).
  • Variables from the Global Land Data Assimilation System (GLDAS) monthly data.
  • Precipitation from TRMM RT.

New Features in Giovanni 4.11

  • Time series of averages computed over shapes:  Compute area averages for time series over shapes, such as countries or states.
  • Map Animation interpolation and smoothing: Improve the visual appearance of map animation using GrADS.
  • Fixed bugs in time series plotting:  Fixed font and sizing issues with time series plots.

New Features in Giovanni 4.10

  • Smoothing Maps:  A new plot option produces smoothed maps forTime averaged, User-Defined Climatology, Accumulation and Correlation services.
  • Histogram: Compute a histogram of the values present in the given temporal and spatial selection.
  • Difference of Time-Averaged Maps: Compute time average for each grid cell for two variables being compared. Plot the differences between the two result maps.

New Features in Giovanni 4.9

  • Download of maps in GeoTIFF format: Allows download of maps (Time averaged, Quasi-Climatology, Accumulation and Correlation) in GeoTIFF format

New Services in Giovanni 4.8

  • Quasi-Climatology Map:  Compute average for a given month or three-month season in each grid cell and plot on a map. (Available for monthly data only.)
  • Seasonal Time Series:  Compute an area averaged time series for each year in the user's selection for a given month or 3-month meteorological season (Available for monthly data only.) 
  • Accumulation Map:  Compute accumulated values instead of averaged values for certain variables, like rainfall.  
    Example:  Plot the accumulated rainfall measured by TRMM for Hurricane Sandy (Oct 23-31, 2012) over the eastern seaboard by clicking here and then pressing the Plot button.

  • Hovmoller Time Series:  Average over latitude for the Longitude-Time Hovmoller, or over longitude for the Latitude-Time Hovmoller.
  • Area Average Scatterplot:  Compare two variables by averaging over the selection box at each timestep, and plotting the results on an X-Y scatterplot.
  • Area-Averaged Difference Time Series:  Compare two variables by averaging each over the selection box and a time series of the difference between the two.

New Data Variables in Giovanni 4.8

Coming soon:

  • Variables from the North American Land Data Assimilation System (NLDAS) model
  • Variables from the SeaWiFS Deep Blue Level 3 data
  • Precipitation from TRMM 3B43
  • Aqua AIRS Level 3 Daily Standard Physical Retrieval (AIRS+AMSU)
    • Cloud Fraction
    • Carbon Monoxide (Total Column)

New Features in Giovanni 4.8

  • New variable picker interface groups similar plot choices
  • Improved seasonal date selection interface
  • New variable naming scheme
  • Greatly improved color bars
  • Fixed missing graticule labels bug
  • Fixed various bugs for bounding boxes crossing the 180 degree meridian

Available data variables

  • Aerosol Optical Depth and other aerosol measurements from MISR, MODIS and OMI instruments, and from the GOCART model
  • Rainfall from TRMM 3B42
  • Heat Flux and Wind Stress from GSSTFM
  • Temperature profiles, Humidity profiles, Geopotential Height profiles, Altitude, Air Pressure, Air Temperature, Surface Temperature, Ozone from AIRS

New for Giovanni-4 vs. Giovanni-3

  • Interactive maps supporting zoom and pan
  • Interactive linked scatterplot + map, both individual points and time-averaged grid points
  • Vector grid maps, shown as arrows
  • Faster (much!) services

New User Interface

The User Interface is being redesigned to be less opaque to new and occasional users.  It also allows users to narrow down variables for selection either by selecting particular attributes ("faceted browsing") or filtering on keywords.  However, experienced Giovanni users may see some "user interface shift shock". In some cases, certain things may seem more difficult or tedious to do than in Giovanni 3.  Please tell us those things, with particular reference to how you used to do them in Giovanni 3!  We may also be able to provide some short cuts (e.g., Bookmarkable URLs below).

Bookmarkable URLs 

Bookmarkable URLs allow you to save URLs in order to re-run the exact same workflow at any future date. These can also be used to save partially filled in forms, acting as a kind of template for common analysis operations.


Known Issues

This release of Giovanni contains some bugs, some known (see Known Issues below), and some not yet known.  Please send us feedback using the Feedback button.  

Browser Compatibility

  • Firefox / Windows:  Giovanni 4 does not load in Firefox 35.0.1 for Windows when used with Squid proxy. Google Chrome and earlier versions of Firefox do not have this problem with Squid. We recommend users try other browsers if this problem occurs.
  • iPad:  Giovanni 4 has not been fully tested on iPad/iPhone Safari.
  • Safari and Chrome on Mac:  Scrollbars for the facets on the right do not show up for some Mac browsers (Safari, Chrome), unless scrollbars are set to Always in the System Preferences -> General of the Mac.

User Interface

  • Parts of borderlines on maps are missing at certain zoom levels.
  • The Feedback button does not work properly with the Chrome browser, as it fails to open a new window for the default email application.
  • On rare occasions, the history tree on the result page will have the wrong leaf highlighted. Clicking on any leaf in the tree will correct the problem.
  • The plot data button sometimes fails to work right after a bookmarkable URL loads. Waiting a few seconds and trying the plot data button again should solve the problem.

Map (Time Averaged)

  • On rare occasions the map is not visible because the color palette fails to load. Plotting the map again usually resolves the problem.
  • The Cancel button may indicate "Cancelling service now..." but not confirm that the service was in fact cancelled.
  • The color palette "Angstrom Exponent Color Map" has colors at intervals of 0.125, except there is no color defined at 1.0, making it non-linear. Using the Re-Plot button in the Options will make the palette linear.
  • If the bounding box is narrow and the variable name is long, the map title may be truncated in the map download.

Interactive Scatter and Time-Averaged Scatter Plots

  • Plot downloads for the scatter plot sometimes render poorly, with text continuing off the plot.
  • The max points limitation is calculated incorrectly for bounding boxes that cross the 180 meridian. 
  • The interactive scatter map won't subset if the original bounding box crosses the 180 meridian.

Time Series Plot

  • Time series plot options for variables of the same quantity type (e.g. precipitation, aerosol optical depth, temperature) need to be set to the same values in order to ensure that all plots get the proper y-axis range.


  • Animation’s ‘Go To’ text field does not respond to the Enter key in Internet Explorer. Clicking outside the text field triggers the correct frame change.

  • Animation is missing the U.S. states layer.

  • The color bar for the animation download is quite distant from the map.

Seasonal Time Series

  • The y-axis label is sometimes too long for the plot and gets cut off.


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Last updated: Sep 22, 2015 02:53 PM ET