NARSTO EPA_SS_BALTIMORE JHU LIDAR Backscatter and Mixing Height DataEntry ID: NARSTO_EPA_JHU_LIDAR
Abstract: The NARSTO_EPA_SS_BALTIMORE_JHU_LIDAR_DATA measurements were taken from May 2001 to September 2002 during the Baltimore Experiment of the U.S. EPA Particulate Matter Supersites Program by the Johns Hopkins University (JHU), Department of Geography and Environmental Engineering. A miniature elastic backscatter LIDAR was operated at several Baltimore locations in the vertical mode with typical ... resolution range of 3 m, typical time steps of 5 seconds, and ranges of 4.5-8 km. All vertical profile measurements of aerosol backscatter were taken during daytime with continuous sampling and can be used to describe composition, dynamics, and extent of the mixing layer and the air aloft. Mixing heights were determined from profile data under cloud-free conditions. Included in this data set are the large ASCII files of the aerosol backscatter data, the calculated mixing height data, and a companion HTML application with color images of the LIDAR profiles of the backscatter signals from aerosols.
The U.S. EPA Particulate Matter (PM) Supersites Program was an ambient air monitoring research program from 1999-2004 designed to provide information of value to the atmospheric sciences, and human health and exposure research communities. Eight geographically diverse projects were chosen to specifically address these EPA research priorities: (1) to characterize PM, its constituents, precursors, co-pollutants, atmospheric transport, and its source categories that affect the PM in any region; (2) to address the research questions and scientific uncertainties about PM source-receptor and exposure-health effects relationships; and (3) to compare and evaluate different methods of characterizing PM including testing new and emerging measurement methods.
NARSTO (formerly North American Research Strategy for Tropospheric Ozone) is a public/private partnership, whose membership spans government, the utilities, industry, and academe throughout Mexico, the United States, and Canada. The primary mission is to coordinate and enhance policy-relevant scientific research and assessment of tropospheric pollution behavior; activities provide input for science-based decision-making and determination of workable, efficient, and effective strategies for local and regional air-pollution management. Data products from local, regional, and international monitoring and research programs are available.
Start Date: 2001-05-22Stop Date: 2002-09-05
ISO Topic Category
Quality Final. Due to an error in the LIDAR system's telemetry data acquisition software, the range values as written in the TDA files (line 13) are incorrect. The software error was discovered post analysis. To properly use the TDA data, a correction factor of 1.25 (linear multiplication) must be applied to obtain the correct range value. That is, instead of 0, 3, 6, 9 ^?4490.89 m, the correct values are 0, 3.75, 7.5, 11.25 ^?5613.6 m.
Data Set Progress
Role: DIF AUTHOR
Email: support-asdc at earthdata.nasa.gov
NASA Langley Atmospheric Science Data Center User and Data Services NASA Langley Research Center Mail Stop 157D
Province or State: VA
Postal Code: 23681-2199
Role: TECHNICAL CONTACT
Email: mariana at jhu.edu
Email: mbparlange at jhu.edu
Boers, R. and Eloranta, E. W.: 1986, Lidar measurements of the
atmospheric entrainment zone and the potential temperature jump
across the top of the mixed layer, Boundary-Layer Meteorol., 34,
Cohn, S. A. and Angevine, W. M.: 2000, Boundary layer height and
entrainment zone thickness measured by lidars and wind-profiling
radars, J. Appl. Meterol., 39, 1233-1247.
Collis, R. T.H. and Russel, P. B.: 1976, Lidar Measurement of
Particles and Gases by Elastic Backscattering and Differential
Absorption, in in Laser Monitoring of the Atmosphere, edited by
E. D. Hinkley, pp. 71-151, Springer-Verlag, Berlin, Germany,
Cooper, D. I. and Eichinger, W. E.: 1994, Structure of the
atmosphere in an urban planetary boundary layer from lidar and
radiosonde observations, J. Geophys. Res., 99, 22937-22948.
Crum, T. D. and Stull, R. B.: 1987, Field-measurements of the
amount of surface-layer air versus height in the entrainment
zone, J. Atmos. Sci., 44, 2743-2753.
H?geli, P., Steyn, D. G., and Strawbridge, K. B.: 2000, Spatial
and temporal variability of mixed-layer depth and entrainment
zone thickness, Boundary-Layer Meteorol., 97, 47-71.
Melfi, S. H., Spinhirne, J. D., Chou, S.-H., and Palm, S. P.:
1985, Lidar observations of vertically organized convection in
the planetary boundary layer over the ocean,
J. Clim. Appl. Meteor., 24, 806-821.
White, A.B., C. J. Senff, and Banta, R. M: 1999, A comparison of
mixing depths observed by ground-based wind profilers and an
airborne lidar, J. Atmos. Oceanic Technol., 16, 584-590.
Extended Metadata Properties
(Click to view more)
Creation and Review Dates
DIF Creation Date: 2004-01-09
Last DIF Revision Date: 2013-11-13