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SAFARI 2000 Modeled Tropospheric Air Mass Trajectories, Dry Season 2000

Data Set Overview

Data setSAFARI 2000 Modeled Tropospheric Air Mass Trajectories, Dry Season 2000
DOI10.3334/ORNLDAAC/792
Release date2005-06-01
ProjectSAFARI 2000 (S2K)
Time Period2000-08-14

Description

The ETA Forecast Trajectory Model was used to produce forecasts of air-parcel trajectories twice a day at three pressure levels over seven sites in Southern Africa for the period August 14, 2000 to September 23, 2000. These sites are Durban, Middleburg, Pietersburg, and Springbok, South Africa; Maun, Botswana; Mongu, Zambia; and Windhoek, Namibia. The twice daily three-dimensional wind field (at 0000 and 1200 UTC) was used as input to the trajectory model. By integrating the vertical motion of the air parcels over a period of time, the trajectory model was able to forecast the net vertical displacement of air parcels during 12-hour periods. The resulting trajectory plots represent the three-dimensional transport of air in time and can be used to examine what is happening in the low-to-mid troposphere during flight and ground-based observations. These levels are most significant in terms of the thermodynamic structure of the troposphere, especially the stable layers and accumulation of material between and below them, as well containing the major levels of subsidence over the subcontinent. The trajectory model output and thermodynamic profiles of the troposphere were used to position aircraft for sampling trace gases, aerosols and other species during the SAFARI 2000 field campaign and to predict regions of high aerosol and trace gas concentrations downwind.The model output data are daily forward and backward trajectory plots at 850 hPa, 700 hPa, and 500 hPa pressure levels for each location. The plots are provided as JPEG images with coordinate, date, and time stamps.

Documentation

Data set reference document

Citation

Freiman, T. 2005. SAFARI 2000 Modeled Tropospheric Air Mass Trajectories, Dry Season 2000. ORNL DAAC, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/792
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Project

SAFARI 2000 (S2K): The SAFARI 2000 project was an international science initiative to study the linkages between land and atmosphere processes in the southern African region. In addition, SAFARI 2000 examined the relationship of biogenic, pyrogenic, and anthropogenic emissions and the consequences of their deposition to the functioning of the biogeophysical and biogeochemical systems of southern Africa. This initiative, which was conducted in 1999-2001, was built around a number of ongoing, already-funded activities by NASA, the international community, and African nations in the southern African region.

Project data set list for SAFARI 2000 (S2K).

Companion Files

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  • trajectory_images_readme.pdf
  • synoptic_data.csv
  • all_templates.zip

Data Files

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Data File (Granule)File SizeDatesLatitudeLongitude
durban_plots.zip 11.9 MB 2000-08-14 - 2000-09-23 30.00S31.00E
maun_plots.zip 13.2 MB 2000-08-14 - 2000-09-23 20.00S23.40E
middleburg_plots.zip 13.2 MB 2000-08-14 - 2000-09-23 25.80S29.30E
mongu_plots.zip 12.8 MB 2000-08-14 - 2000-09-23 15.30S23.20E
pietersburg_plots.zip 14.0 MB 2000-08-14 - 2000-09-23 23.90S29.50E
plots_20000814.zip 937.3 KB 2000-08-14 15.30S To 30.00S31.00E To 17.10E
plots_20000815.zip 939.2 KB 2000-08-15 15.30S To 30.00S31.00E To 17.10E
plots_20000816.zip 932.3 KB 2000-08-16 15.30S To 30.00S31.00E To 17.10E
plots_20000817.zip 2.5 MB 2000-08-17 15.30S To 30.00S31.00E To 17.10E
plots_20000818.zip 2.6 MB 2000-08-18 15.30S To 30.00S31.00E To 17.10E
plots_20000819.zip 2.6 MB 2000-08-19 15.30S To 30.00S31.00E To 17.10E
plots_20000820.zip 1.3 MB 2000-08-20 15.30S To 30.00S31.00E To 17.10E
plots_20000821.zip 2.6 MB 2000-08-21 15.30S To 30.00S31.00E To 17.10E
plots_20000822.zip 2.7 MB 2000-08-22 15.30S To 30.00S31.00E To 17.10E
plots_20000823.zip 2.6 MB 2000-08-23 15.30S To 30.00S31.00E To 17.10E
plots_20000824.zip 2.6 MB 2000-08-24 15.30S To 30.00S31.00E To 17.10E
plots_20000825.zip 2.6 MB 2000-08-25 15.30S To 30.00S31.00E To 17.10E
plots_20000826.zip 2.6 MB 2000-08-26 15.30S To 30.00S31.00E To 17.10E
plots_20000827.zip 2.6 MB 2000-08-27 15.30S To 30.00S31.00E To 17.10E
plots_20000828.zip 2.6 MB 2000-08-28 15.30S To 30.00S31.00E To 17.10E
plots_20000829.zip 366.1 KB 2000-08-29 15.30S To 30.00S31.00E To 17.10E
plots_20000830.zip 2.6 MB 2000-08-30 15.30S To 30.00S31.00E To 17.10E
plots_20000831.zip 2.6 MB 2000-08-31 15.30S To 30.00S31.00E To 17.10E
plots_20000901.zip 2.6 MB 2000-09-01 15.30S To 30.00S31.00E To 17.10E
plots_20000902.zip 2.6 MB 2000-09-02 15.30S To 30.00S31.00E To 17.10E
plots_20000903.zip 2.6 MB 2000-09-03 15.30S To 30.00S31.00E To 17.10E
plots_20000904.zip 2.6 MB 2000-09-04 15.30S To 30.00S31.00E To 17.10E
plots_20000905.zip 2.6 MB 2000-09-05 15.30S To 30.00S31.00E To 17.10E
plots_20000906.zip 2.6 MB 2000-09-06 15.30S To 30.00S31.00E To 17.10E
plots_20000907.zip 2.7 MB 2000-09-07 15.30S To 30.00S31.00E To 17.10E
plots_20000908.zip 2.7 MB 2000-09-08 15.30S To 30.00S31.00E To 17.10E
plots_20000909.zip 2.6 MB 2000-09-09 15.30S To 30.00S31.00E To 17.10E
plots_20000910.zip 2.7 MB 2000-09-10 15.30S To 30.00S31.00E To 17.10E
plots_20000911.zip 2.7 MB 2000-09-11 15.30S To 30.00S31.00E To 17.10E
plots_20000912.zip 1.7 MB 2000-09-12 15.30S To 30.00S31.00E To 17.10E
plots_20000914.zip 2.7 MB 2000-09-14 15.30S To 30.00S31.00E To 17.10E
plots_20000915.zip 2.7 MB 2000-09-15 15.30S To 30.00S31.00E To 17.10E
plots_20000916.zip 2.6 MB 2000-09-16 15.30S To 30.00S31.00E To 17.10E
plots_20000917.zip 2.6 MB 2000-09-17 15.30S To 30.00S31.00E To 17.10E
plots_20000920.zip 2.6 MB 2000-09-20 15.30S To 30.00S31.00E To 17.10E
plots_20000921.zip 2.7 MB 2000-09-21 15.30S To 30.00S31.00E To 17.10E
plots_20000922.zip 2.6 MB 2000-09-22 15.30S To 30.00S31.00E To 17.10E
plots_20000923.zip 1.9 MB 2000-09-23 15.30S To 30.00S31.00E To 17.10E
springbok_plots.zip 11.7 MB 2000-08-14 - 2000-09-23 29.70S17.80E
windhoek_plots.zip 12.3 MB 2000-08-14 - 2000-09-23 22.60S17.10E

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Files related to this data set have been downloaded on 82 occasions since 2007-12-07, totaling 1418 files.