UMBC Joint Center for Earth Systems Technology (JCET)
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The Joint Center for Earth Systems Technology (JCET) was formed under a Cooperative agreement between the Earth Science Division of NASA Goddard Space Flight Center (GSFC) and the University of Maryland, Baltimore County (UMBC) in 1995. The JCET family consists of its business staff, students, research faculty, GSFC Sponsors, appointed fellows and affiliated tenured/tenure-track faculty. JCET is an innovative center where these scientists interact in a seamless fashion with the support of an efficient business and administrative unit.
Recent Submissions
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Improving NASA’s Earth Satellite and Model Data Discoverability for Interdisciplinary Research, Applications, and Education
(Ubiquity Press, 2023-04-28)Since the Internet era began, numerous earth science data services have been developed to facilitate data discovery (e.g., data sources, documents, facts, visualization, opinions) and data access for research and application ... -
Deep Spatiotemporal Clustering: A Temporal Clustering Approach for Multi-dimensional Climate Data
(2023-04-27)Clustering high-dimensional spatiotemporal data using an unsupervised approach is a challenging problem for many data-driven applications. Existing state-of-the-art methods for unsupervised clustering use different similarity ... -
Atmospheric nourishment of global ocean ecosystems
(AAAS, 2023-05-04)Over the vast open ocean, vital nutrients for phytoplankton growth in the sunlit surface layer are largely provided through physical transport from deep waters, but some nutrients are also provided through atmospheric ... -
MAPPING AREAS IMPACTED BY VOLCANIC FLOWS DURING AN ERUPTION USING SYNTHETIC APERTURE RADAR AND OPTICAL IMAGERY
(ISPRS, 2023-04-21)During volcanic disasters, the remoteness of the terrains combined with potentially incapacitated lifelines (e.g., disturbed transportation network) prevent ground-based surveys for timely assessment of damage extents. To ... -
Optimizing retrieval spaces of bio-optical models for remote sensing of ocean color
(OPTICA, 2023-04-21)We investigated the optimal number of independent parameters required to accurately represent spectral remote sensing reflectances (Rᵣₛ) by performing principal component analysis on quality controlled in situ and ... -
Optimizing retrieval spaces of bio-optical models for remote sensing of ocean color
(Optica, 2023-04-21)We investigated the optimal number of independent parameters required to accurately represent spectral remote sensing reflectances (𝑅ᵣₛ ) by performing principal component analysis on quality controlled in situ and ... -
High precision, absolute total column ozone measurements from the Pandora spectrometer system: Comparisons with data from a Brewer double monochromator and Aura OMI
(AGU, 2012-08-22)We present new, high precision, high temporal resolution measurements of total column ozone (TCO) amounts derived from ground-based direct-sun irradiance measurements using our recently deployed Pandora single-grating ... -
MAX-DOAS formaldehyde slant column measurements during CINDI: intercomparison and analysis improvement
(EGU, 2013-01-31)We present intercomparison results for formaldehyde (HCHO) slant column measurements performed during the Cabauw Intercomparison campaign of Nitrogen Dioxide measuring Instruments (CINDI) that took place in Cabauw, the ... -
The Cabauw Intercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI): design, execution, and early results
(EGU, 2012-02-27)From June to July 2009 more than thirty different in-situ and remote sensing instruments from all over the world participated in the Cabauw Intercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI). The ... -
Effects of local meteorology and aerosols on ozone and nitrogen dioxide retrievals from OMI and pandora spectrometers in Maryland, USA during DISCOVER-AQ 2011
(Springer Nature, 2013-04-19)An analysis is presented for both ground- and satellite-based retrievals of total column ozone and nitrogen dioxide levels from the Washington, D.C., and Baltimore, Maryland, metropolitan area during the NASA-sponsored ... -
Diurnal variation of 340 nm Lambertian equivalent reflectivity due to clouds and aerosols over land and oceans
(AGU, 2011-06-08)Thirty years of satellite measurements of Lambert equivalent reflectivity (LER) at 340 nm have been analyzed to show the changes in diurnal LER that are associated with cloud and aerosol amounts. Five degree zonal mean ... -
Direct Sun measurements of NO₂ column abundances from Table Mountain, California: Intercomparison of low- and high-resolution spectrometers
(AGU, 2010-07-15)The NO₂ total column abundance, CNO₂ , was measured with a direct Sun viewing technique using three different instruments at NASA Jet Propulsion Laboratory’s (JPL)Table Mountain Facility in California during an instrument ... -
Use of an improved radiation amplification factor to estimate the effect of total ozone changes on action spectrum weighted irradiances and an instrument response function
(AGU, 2010-12-09)Multiple scattering radiative transfer results are used to calculate action spectrum weighted irradiances and fractional irradiance changes in terms of a power law in ozone Ω, U(Ω/200)⁻ᴿᴬᶠ, where the new radiation amplification ... -
Intercomparison of slant column measurements of NO₂ and O₄ by MAX-DOAS and zenith-sky UV and visible spectrometers
(EGU, 2010-11-23)In June 2009, 22 spectrometers from 14 institutes measured tropospheric and stratospheric NO₂ from the ground for more than 11 days during the Cabauw Intercomparison Campaign of Nitrogen Dioxide measuring Instruments ... -
Global increase in UV irradiance during the past 30 years (1979–2008) estimated from satellite data
(AGU, 2010-02-25)Zonal average ultraviolet irradiance (flux ultraviolet, Fᵤᵥ) reaching the Earth's surface has significantly increased since 1979 at all latitudes except the equatorial zone. Changes are estimated in zonal average Fᵤᵥ caused ... -
Bio-Optical Characteristics and Remote Sensing in the Mid Chesapeake Bay Through Integration of Observations and Radiative Transfer Closure
Remotely sensed ocean color is an essential tool for studying water quality and biogeochemical processes, and applying results for coastal ecosystem assessment and management. Successful interpretation and application ... -
NO₂ column amounts from ground-based Pandora and MFDOAS spectrometers using the direct-sun DOAS technique: Intercomparisons and application to OMI validation
(AGU, 2009-07-15)Vertical column amounts of nitrogen dioxide, C(NO₂), are derived from ground-based direct solar irradiance measurements using two new and independently developed spectrometer systems, Pandora (Goddard Space Flight Center) ... -
Changes in cloud and aerosol cover (1980–2006) from reflectivity time series using SeaWiFS, N7-TOMS, EP-TOMS, SBUV-2, and OMI radiance data
(AGU, 2009-01-01)The amount of solar radiation reflected back to space or reaching the Earth's surface is primarily governed by the amount of cloud cover and, to a much lesser extent, by Rayleigh scattering, aerosols, and various absorbing ... -
Balloon exoplanet nulling interferometer (BENI)
(SPIE, 2009-08-19)We evaluate the feasibility of a balloon-borne nulling interferometer to detect and characterize an exosolar planet and the surrounding debris disk. The existing instrument consists of a three-telescope Fizeau imaging ... -
Comparison of atmospheric spectral radiance measurements from five independently calibrated systems
(Royal Society of Chemistry, 2009-02-09)A variety of instruments have been developed over the past 50 years to measure spectral radiance in absolute units at UV and visible wavelengths with high spectral resolution. While there is considerable experience in the ...
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