Now showing items 5-24 of 57

    • CAFE: a new, improved non-resonant laser-induced fluorescence instrument for airborne in situ measurement of formaldehyde 

      Clair, Jason M. St.; Swanson, Andrew K.; Bailey, Steven A.; Hanisco, Thomas F. (Copernicus Publications, 2019-08-30)
      NASA Compact Airborne Formaldehyde Experiment (CAFE) is a nonresonant laser-induced fluorescence instrument for airborne in situ measurement of formaldehyde (HCHO). The instrument is described here with highlighted improvements ...
    • Characterization of smoke and dust episode over West Africa: comparison of MERRA-2 modeling with multiwavelength Mie–Raman lidar observations 

      Veselovskii, Igor; Goloub, Philippe; Podvin, Thierry; Tanre, Didier; da Silva, Arlindo; C (European Geosciences Union, 2018)
      Observations of multiwavelength Mie–Raman lidar taken during the SHADOW field campaign are used to analyze a smoke–dust episode over West Africa on 24–27 December 2015. For the case considered, the dust layer extended from ...
    • Comparison of Global and Continental Land Cover Products for Selected Study Areas in South Central and Eastern European Region 

      Manakos, Ioannis; Tomaszewska, Monika; Gkinis, Ioannis; Brovkina, Olga; Filchev, Lachezar; Genc, Levent; Gitas, Ioannis Z.; Halabuk, Andrej; Inalpulat, Melis; Irimescu, Anisoara; Jelev, Georgi; Karantzalos, Konstantinos; Katagis, Thomas; Mesaroš, Minučer; Mihailescu, Denis; Nita, Mihai; Rusnak, Tomas; Stych, Premysl; Zemek, Frantisek; Albrechtová, Jana; Campbell, Petya (MDPI, 2018-12-06)
      Land cover is one of the key terrestrial variables used for monitoring and as input for modelling in support of achieving the United Nations Strategical Development Goals. Global and Continental Land Cover Products (GCLCs) ...
    • Comparisons of bispectral and polarimetric retrievals of marine boundary layer cloud microphysics: case studies using a LES–satellite retrieval simulator 

      Miller, Daniel J.; Zhang, Zhibo; Platnick, Steven; Ackerman, Andrew S.; Werner, Frank; Cornet, Celine; Knobelspiesse, Kirk (Copernicus Publications, 2018-06-26)
      Many passive remote-sensing techniques have been developed to retrieve cloud microphysical properties from satellite-based sensors, with the most common approaches being the bispectral and polarimetric techniques. These ...
    • Creating a Single Radiance Climate Record from AIRS, IASI and CrIS 

      Hepplewhite, Chris; Motteler, Howard; Machado, Sergio De-Souza; Buzckowski, Steven; Strow, L. Larrabee (2018)
      We investigate three key aspects for creating a climate record from multiple hyperspectral infra-red sensors. The motivation is to produce a multi-decade continuous record of global radiance measured leaving the atmosphere. ...
    • Deep space observations of sun glint over oceans 

      Varnai, Tamas; Marshak, Alexander; Kostinski, Alexander (American Geophysical Union, 2018-07-09)
      Every hour or two, the Earth Polychromatic Imaging Camera (EPIC) onboard the DSCOVR satellite provides unique full-color images of the sunlit side of the Earth from the L1 Lagrangian point, which is four times farther the ...
    • Dimensionality Reduction Using Sliced Inverse Regression in Modeling Large Climate Data 

      Allison, Ross Flieger; Miller, Lois; Sykes, Danielle; Valle, Pablo; Popuri, Sai K.; Wijekoon, Nadeesri; Neerchal, Nagaraj K.; Mehta, Amita (2016)
      Prediction of precipitation using simulations on various climate variables provided by Global Climate Models (GCM) as covariates is often required for regional hydrological assessment studies. We use a sufficient dimension ...
    • Diurnal and Seasonal Variations in Chlorophyll Fluorescence Associated with Photosynthesis at Leaf and Canopy Scales 

      Campbell, Petya K. E.; Huemmrich, Karl F.; Middleton, Elizabeth M.; Ward, Lauren A.; Julitta, Tommaso; Daughtry, Craig S. T.; Burkart, Andreas; Russ, Andrew L.; Kustas, William P. (MDPI, 2019-02-27)
      There is a critical need for sensitive remote sensing approaches to monitor the parameters governing photosynthesis, at the temporal scales relevant to their natural dynamics. The photochemical reflectance index (PRI) and ...
    • Enhanced Data Exploration and Visualization Tool for Large Spatio-Temporal Climate Data 

      Kahmann, Sydney; Crasto, Ethan; Rodriguez, Paula; Smith, Benjamin; Popuri, Sai K.; Wijekoon, Nadeesri; Neerchal, Nagaraj K.; Mehta, Amita
      Predictions of climate variables like precipitation and maximum/minimum temperatures play crucial role in assessing the impact of decadal climate changes on regional water availability. This technical report describes a ...
    • ESTIMATE OF RAIN EVAPORATION RATES FROM DUAL-WAVELENGTH LIDAR MEASUREMENTS: COMPARISON AGAINST A MODEL ANALYTICAL SOLUTION 

      Lolli, Simone; Di Girolamo, Paolo; Demoz, Belay; Li, Xiaowen; Welton, Ellsworth J (EPF, 2018)
      Rain evaporation significantly contributes to moisture and heat cloud budgets. In this paper, we illustrate an approach to estimate the median volume raindrop diameter and the rain evaporation rate profiles from dual-wavelength ...
    • An Evaluation of Marine Boundary Layer Cloud Property Simulations in the Community Atmosphere Model Using Satellite Observations: Conventional Subgrid Parameterization versus CLUBB 

      Song, Hua; Zhang, Zhibo; Ma, Po-Lun; Ghan, Steven J.; Wang, Minghuai (American Meteorological Society (ACM), 2018-02-19)
      This paper presents a satellite-observation-based evaluation of the marine boundary layer (MBL) cloud properties from two Community Atmosphere Model, version 5 (CAM5), simulations, one with the standard parameterization ...
    • Evaluation of Terra-MODIS C6 and C6.1 Aerosol Products against Beijing, XiangHe, and Xinglong AERONET Sites in China during 2004-2014 

      Bilal, Muhammad; Nazeer, Majid; Nichol, Janet; Qiu, Zhongfeng; Wang, Lunche; Bleiweiss, Max P.; Shen, Xiaojing; Campbell, James R.; Lolli, Simone (MDPI, 2019-02-27)
      In this study, Terra-MODIS (Moderate Resolution Imaging Spectroradiometer) Collections 6 and 6.1 (C6 & C6.1) aerosol optical depth (AOD) retrievals with the recommended high-quality flag (QF = 3) were retrieved from ...
    • Exploring systematic offsets between aerosol products from the two MODIS sensors 

      Levy, Robert C.; Mattoo, Shana; Sawyer, Virginia; Shi, Yingxi; Colarco, Peter R.; Lyapustin, Alexei I.; Wang, Yujie; Remer, Lorraine A. (Copernicus Publications, 2018-07-13)
      Long-term measurements of global aerosol loading and optical properties are essential for assessing climate-related questions. Using observations of spectral reflectance and radiance, the dark-target (DT) aerosol retrieval ...
    • A framework for quantifying the impacts of sub-pixel reflectance variance and covariance on cloud optical thickness and effective radius retrievals based on the bispectral method 

      Zhang, Z.; Werner, F.; Wind, G.; Platnick, S.; Ackerman, A. S.; Girolamo, L. Di; Marshak, A.; Meyer, Kerry; Cho, H. M. (American Institute of Physics (AIP), 2017-02-22)
      The so-called bi-spectral method retrieves cloud optical thickness (τ) and cloud droplet effective radius (rₑ) simultaneously from a pair of cloud reflectance observations, one in a visible or near infrared (VIS/NIR) band ...
    • Frequency and causes of failed MODIS cloud property retrievals for liquid phase clouds over global oceans 

      Cho, Hyoun Myoung; Zhang, Zhibo; Meyer, Kerry; Lebsock, Matthew; Platnick, Steven; Ackerman, Andrew S.; Girolamo, Larry Di; Labonnote, Laurent C.; Cornet, Céline; Riedi, Jerome; Holz, Robert E. (American Geophysical Union (AGU), 2015-04-09)
      Moderate Resolution Imaging Spectroradiometer (MODIS) retrieves cloud droplet effective radius (rₑ) and optical thickness (τ) by projecting observed cloud reflectances onto a precomputed look‐up table (LUT). When observations ...
    • Going Beyond Standard Ocean Color Observations: Lidar and Polarimetry 

      Jamet, Cédric; Ibrahim, Amir; Ahmad, Ziauddin; Angelini, Federico; Babin, Marcel; Behrenfeld, Michael J.; Boss, Emmanuel; Cairns, Brian; Churnside, James; Chowdhary, Jacek; Davis, Anthony B.; Dionisi, Davide; Duforêt-Gaurier, Lucile; Franz, Bryan; Frouin, Robert; Gao, Meng; Gray, Deric; Hasekamp, Otto; He, Xianqiang; Hostetler, Chris; Kalashnikova, Olga V.; Knobelspiesse, Kirk; Lacour, Léo; Loisel, Hubert; Martins, Vanderlei; Rehm, Eric; Remer, Lorraine; Sanhaj, Idriss; Stamnes, Knut; Stamnes, Snorre; Victori, Stéphane; Werdel, Jeremy; Zhai, Peng-Wang (2019-05-21)
      Passive ocean color images have provided a sustained synoptic view of the distribution of ocean optical properties and color and biogeochemical parameters for the past 20-plus years. These images have revolutionized our ...
    • Hybrid Causality Analysis of ENSO’s Global Impacts on Climate Variables Based on Data-Driven Analytics and Climate Model Simulation 

      Song, Hua; Tian, Jing; Huang, Jingfeng; Guo, Pei; Zhang, Zhibo; Wang, Jianwu (Frontiers, 2019-09-18)
      Numerous studies have indicated that El Niño and the southern oscillation (ENSO) could have determinant impacts on remote weather and climate using the conventional correlation-based methods, which however, cannot identify ...
    • Hyperspectral Earth Observation from IASI: Five Years of Accomplishments 

      Hilton, Fiona; Armante, Raymond; August, Thomas; Barnet, Chris; Bouchard, Aurelie; Camy-Peyret, Claude; Capelle, Virginie; Clarisse, Lieven; Clerbaux, Cathy; Coheur, Pierre-Francois; Collard, Andrew; Crevoisier, Cyril; Dufour, Gaelle; Edwards, David; Faijan, Francois; Fourrié, Nadia; Gambacorta, Antonia; Goldberg, Mitchell; Guidard, Vincent; Hurtmans, Daniel; Illingworth, Samuel; Jacquinet-Husson, Nicole; Kerzenmacher, Tobias; Klaes, Dieter; Lavanant, Lydie; Masiello, Guido; McNally, Anthony; Matricardi, Marco; Pavelin, Edward; Newman, Stuart; Payan, Sebastien; Péquignot, Eric; Peyridieu, Sophie; Phulpin, Thierry; Remedios, John; Schlüssel, Peter; Serio, Carmine; Strow, Larrabee; Stubenrauch, Claudia; Taylor, Jonathan; Tobin, David; Wolf, Walter; Zhou, Daniel (American Meteorological Society, 2012-03-01)
      The Infrared Atmospheric Sounding Interferometer (IASI) forms the main infrared sounding component of the European Organisation for the Exploitation of Meteorological Satellites's (EUMETSAT's) Meteorological Operation ...
    • The ILRS: approaching 20 years and planning for the future 

      Pearlman, Michael R.; Noll, Carey E.; Pavlis, Erricos C.; Lemoine, Frank G.; Combrink, Ludwig; Degnan, John J.; Kirchner, Georg; Schreiber, Ulrich (Springer Nature Switzerland AG., 2019-03-19)
      The International Laser Ranging Service (ILRS) was established by the International Association of Geodesy (IAG) in 1998 to support programs in geodesy, geophysics, fundamental constants and lunar research, and to provide ...
    • Impact of aerosol non-sphericity on the satellite remote sensing of CO₂ 

      Chen, Xi; Wang, Jun; Yang, Dongxu; Xu, Xiaoguang; Yang, Ping; Dubovik, Oleg; Liu, Yi; Mishchenko, Michael; Spurr, Robert
      Existing algorithms for satellite remote sensing of CO₂ assume that all atmospheric aerosol particles are spherical. This assumption, however, is only valid for the atmosphere in the absence of dust particles that are ...