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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Call to Action for Global Access to and Harmonization of Quality Information of Individual Earth Science Datasets
(OSF, 2020-12-15)Knowledge about the quality of data and metadata is important to support informed decisions on the (re)use of individual datasets and is an essential part of the ecosystem that supports open science. Quality assessments ... -
Large global variations in measured airborne metal concentrations driven by anthropogenic sources
(Nature, 2020-12-11)Globally consistent measurements of airborne metal concentrations in fine particulate matter (PM₂.₅) are important for understanding potential health impacts, prioritizing air pollution mitigation strategies, and enabling ... -
Machine Learning Based Algorithms for Global Dust Aerosol Detection From Satellite Images: Inter-Comparisons and Evaluation
(2020-12-08)Identifying dust aerosols from passive satellite images is of great interest for many applications. In this study, we developed 5 different machine-learning (ML) and deep-learning (DL) based algorithms, including Logistic ... -
Density Estimation using Entropy Maximization for Semi-continuous Data
(2020-11-17)Semi-continuous data comes from a distribution that is a mixture of the point mass at zero and a continuous distribution with support on the positive real line. A clear example is the daily rainfall data. In this paper, ... -
Improved representation of the global dust cycle using observational constraints on dust properties and abundance
(Copernicus Publications, 2020-11-23)Even though desert dust is the most abundant aerosol by mass in Earth's atmosphere, atmospheric models struggle to accurately represent its spatial and temporal distribution. These model errors are partially caused by ... -
High Resolution, AltitudeCorrected Monthly Satellite Precipitation Product Improves Estimates in Mountain Regions
Aerosol optical properties derived from an early version of the Dark Target (DT) algorithm applied to the Moderateresolution Imaging Spectroradiometer (MODIS) on Terra, for 12 June 2001 -
A New Raman Water Vapor Lidar Calibration Technique and Measurements in the Vicinity of Hurricane Bonnie
The NAcA/Goddard Space Flight Center Scanning Raman Lidar has made measurements of water vapor and aerosols for almost ten years. Calibration of the water vapor data has typically been performed by comparison with another ... -
Identifying meteorological influences on marine low cloud mesoscale morphology using deep learning classifications
(Copernicus Publications, 2020-11-03)Marine low cloud mesoscale morphology in the southeastern Pacific Ocean is analyzed using a large dataset of machine-learning generated classifications spanning three years. Meteorological variables and cloud properties ... -
Airborne Lunar Spectral Irradiance (air-LUSI) Missioni Capability Demonstration
(Calcon, 2020-09-21)The Moon is a very useful calibration target for Earth-observing sensors in orbit because its surface is radiometrically stable and it has a radiant flux comparable to Earth scenes. To predict the lunar irradiance given ... -
Effect of volcanic emissions on clouds during the 2008 and 2018 Kilauea degassing events
(Copernicus Publications, 2020-10-22)Aerosol emissions from volcanic eruptions in otherwise clean environments are regarded as natural experiments where the aerosol effects on clouds and climate can be partitioned from other effects like meteorology and ... -
32-year record-high surface melt in 2019/2020 on north George VI Ice Shelf, Antarctic Peninsula
(Copernicus Publications, 2020-10-22)In the 2019/2020 austral summer, the surface melt duration and extent on the northern George VI Ice Shelf (GVIIS) was exceptional compared to the 31 previous summers of dramatically lower melt. This finding is based on ... -
Copula-based Correlation Structure for Multivariate Emission Distributions in Hidden Markov Models
(2020)Hidden Markov models (HMM) for multi-site daily precipitation usually assume that precipitation at each location is independently distributed conditional on the daily state; correlation in precipitation at different locations ... -
New Observations of Upper Tropospheric NO₂ from TROPOMI
(EGU Publications, 2020-10-08)Nitrogen oxides (NOₓ ≡ NO + NO₂) in the NOₓ-limited upper troposphere (UT) are long-lived and so have a large influence on the oxidizing capacity of the troposphere and formation of the greenhouse gas ozone. Models ... -
Chesapeake Bay
(AWMA Publications, 2020-10) -
The GPM Validation Network and Evaluation of Satellite-Based Retrievals of the Rain Drop Size Distribution
(MDPI, 2020-09-21)A unique capability of the Global Precipitation Measurement (GPM) mission is its ability to better estimate the raindrop size distribution (DSD) on a global scale. To validate the GPM DSD retrievals, a network of more than ... -
A Comparative Study of Rainfall Observations during GPM IPHEx Field Campaign
(2014-12)Measurement capabilities of a new optical disdrometer called High-speed Optical Disdrometer (HOD) were evaluated through a comparative study with the 2- Dimensional Video Disdrometer (2DVD), and the Pluvio200 weighing ... -
Integration of GOCI and AHI Yonsei Aerosol Optical Depth Products During the 2016 KORUS-AQ and 2018 EMeRGe Campaigns
(Copernicus Publications, 2020-09-17)The Yonsei AErosol Retrieval (YAER) algorithm for the Geostationary Ocean Color Imager (GOCI) retrieves aerosol optical properties only over dark surfaces, so it is important to mask pixels with bright surfaces. The Advanced ... -
Inactivation times from 290 to 315 nm UVB in sunlight for SARS coronaviruses CoV and CoV-2 using OMI satellite data for the sunlit Earth
(Springer Nature, 2020-09-15)UVB in sunlight, 290–315 nm, can inactivate SARS CoV and SARS CoV-2 viruses on surfaces and in the air. Laboratory exposure to ultraviolet irradiance in the UVC range inactivates many viruses and bacteria in times less ... -
JCET Web Tools for the Assessment of the ILRS Network's Performance
We present, discuss and demonstrate webaccessed tools developed at JCET using the products of the ILRS Analysis and Associate Analysis Centers (AC & AAC) to aid stations, missions and analysts assess the performance of the ... -
Expanded SLR Target Constellation for Improved Future ITRFs
The GGOS-imposed requirements to be met by all geodetic techniques per decade are very stringent: 1 mm position and 0.1 mm/y temporal stability. We are an order of magnitude worse today due to a poor ground segment and ...
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