Search Results - "Measurement techniques"

Advancements in the Aerosol Robotic Network (AERONET) Version 3 database – automated near-real-time quality control algorithm with improved cloud screening for Sun photometer aerosol optical depth (AOD) measurements by Giles, David M., Siniuk, Aliaksandr, Sorokin, Mikhail G., Schafer, Joel S., Smirnov, Alexander, Slutsker, Ilya, Eck, Thomas F., Holben, Brent N., Lewis, Jasper R., Campbell, James R., Welton, Ellsworth J., Korkin, Sergey V., Lyapustin, Alexei I.

“…The Aerosol Robotic Network (AERONET) has provided highly accurate, ground-truth measurements of the aerosol optical depth (AOD) using Cimel Electronique…”
Get full text

MODIS Collection 6 MAIAC Algorithm by Lyapustin, Alexei, Wang, Yujie, Korkin, Sergey, Huang, Dong

“…This paper describes the latest version of the algorithm MAIAC (Multi-Angle Implementation of Atmospheric Correction) used for processing the MODIS…”
Get full text

The CALIPSO Version 4 Automated Aerosol Classification and Lidar Ratio Selection Algorithm by Kim, Man-Hae, Omar, Ali H, Tackett, Jason L, Vaughan, Mark A, Winker, David M, Trepte, Charles R, Hu, Yongxiang, Liu, Zhaoyan, Poole, Lamont R, Pitts, Michael C, Kar, Jayanta, Magill, Brian E

“…The Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) version 4.10 (V4) level 2 aerosol data products, released in November 2016, include substantial…”
Get full text

The AERONET Version 3 aerosol retrieval algorithm, associated uncertainties and comparisons to Version 2 by Sinyuk, Alexander, Holben, Brent N, Eck, Thomas F, Giles, David M, Slutsker, Ilya, Korkin, Sergey, Schafer, Joel S, Smirnov, Alexander, Sorokin, Mikhail, Lyapustin, Alexei

“…The Aerosol Robotic Network (AERONET) Version 3 (V3) aerosol retrieval algorithm is described, which is based on the Version 2 (V2) algorithm with numerous…”
Get full text

S5P TROPOMI NO2 slant column retrieval: method, stability, uncertainties and comparisons with OMI by Jos van Geffen, K Folkert Boersma, Eskes, Henk, Sneep, Maarten, Mark ter Linden, Zara, Marina, Veefkind, J Pepijn

“…The Tropospheric Monitoring Instrument (TROPOMI), aboard the Sentinel-5 Precursor (S5P) satellite, launched on 13 October 2017, provides measurements of…”
Get full text

Ground-based validation of the Copernicus Sentinel-5P TROPOMI NO2 measurements with the NDACC ZSL-DOAS, MAX-DOAS and Pandonia global networks by Verhoelst, Tijl, Compernolle, Steven, Pinardi, Gaia, Jean-Christopher, Lambert, Eskes, Henk J, Eichmann, Kai-Uwe, Ann Mari Fjæraa, Granville, José, Niemeijer, Sander, Cede, Alexander, Tiefengraber, Martin, Hendrick, François, Pazmiño, Andrea, Bais, Alkiviadis, Bazureau, Ariane, K Folkert Boersma, Bognar, Kristof, Dehn, Angelika, Donner, Sebastian, Elokhov, Aleksandr, Gebetsberger, Manuel, Goutail, Florence, Michel Grutter de la Mora, Gruzdev, Aleksandr, Gratsea, Myrto, Hansen, Georg H, Irie, Hitoshi, Jepsen, Nis, Kanaya, Yugo, Karagkiozidis, Dimitris, Kivi, Rigel, Kreher, Karin, Levelt, Pieternel F, Liu, Cheng, Müller, Moritz, Monica Navarro Comas, Piters, Ankie J M, Pommereau, Jean-Pierre, Portafaix, Thierry, Prados-Roman, Cristina, Puentedura, Olga, Querel, Richard, Remmers, Julia, Richter, Andreas, Rimmer, John, Claudia Rivera Cárdenas, Lidia Saavedra de Miguel, Sinyakov, Valery P, Stremme, Wolfgang, Strong, Kimberly, Michel Van Roozendael, Veefkind, J Pepijn, Wagner, Thomas, Wittrock, Folkard, Margarita Yela González, Zehner, Claus

“…This paper reports on consolidated ground-based validation results of the atmospheric NO2 data produced operationally since April 2018 by the TROPOspheric…”
Get full text

A machine learning calibration model using random forests to improve sensor performance for lower-cost air quality monitoring by Zimmerman, Naomi, Presto, Albert A, Kumar, Sriniwasa P. N, Gu, Jason, Hauryliuk, Aliaksei, Robinson, Ellis S, Robinson, Allen L, R. Subramanian

“…Low-cost sensing strategies hold the promise of denser air quality monitoring networks, which could significantly improve our understanding of personal air…”
Get full text

The "dual-spot" Aethalometer: an improved measurement of aerosol black carbon with real-time loading compensation by Drinovec, L, Močnik, G, Zotter, P, Prévôt, A. S. H, Ruckstuhl, C, Coz, E, Rupakheti, M, Sciare, J, Müller, T, Wiedensohler, A, Hansen, A. D. A

“…Aerosol black carbon is a unique primary tracer for combustion emissions. It affects the optical properties of the atmosphere and is recognized as the second…”
Get full text

Development and application of a United States-wide correction for PM2.5 data collected with the PurpleAir sensor by Barkjohn, Karoline K, Gantt, Brett, Clements, Andrea L

“…PurpleAir sensors, which measure particulate matter (PM), are widely used by individuals, community groups, and other organizations including state and local…”
Get full text

The Collection 6 MODIS aerosol products over land and ocean by Levy, R. C, Mattoo, S, Munchak, L. A, Remer, L. A, Sayer, A. M, Patadia, F, Hsu, N. C

“…The twin Moderate resolution Imaging Spectroradiometer (MODIS) sensors have been flying on Terra since 2000 and Aqua since 2002, creating an extensive data set…”
Get full text

Field evaluation of low-cost particulate matter sensors in high- and low-concentration environments by Zheng, Tongshu, Bergin, Michael H, Johnson, Karoline K, Tripathi, Sachchida N, Shirodkar, Shilpa, Landis, Matthew S, Sutaria, Ronak, Carlson, David E

“…Low-cost particulate matter (PM) sensors are promising tools for supplementing existing air quality monitoring networks. However, the performance of the new…”
Get full text

Improved retrievals of carbon dioxide from Orbiting Carbon Observatory-2 with the version 8 ACOS algorithm by O'Dell, Christopher W, Eldering, Annmarie, Wennberg, Paul O, Crisp, David, Gunson, Michael R, Fisher, Brendan, Frankenberg, Christian, Kiel, Matthäus, Lindqvist, Hannakaisa, Mandrake, Lukas, Merrelli, Aronne, Natraj, Vijay, Nelson, Robert R, Osterman, Gregory B, Payne, Vivienne H, Taylor, Thomas E, Wunch, Debra, Drouin, Brian J, Oyafuso, Fabiano, Chang, Albert, McDuffie, James, Smyth, Michael, Baker, David F, Basu, Sourish, Chevallier, Frédéric, Crowell, Sean M. R, Feng, Liang, Palmer, Paul I, Dubey, Mavendra, García, Omaira E, Griffith, David W. T, Hase, Frank, Iraci, Laura T, Kivi, Rigel, Morino, Isamu, Notholt, Justus, Ohyama, Hirofumi, Petri, Christof, Roehl, Coleen M, Sha, Mahesh K, Strong, Kimberly, Sussmann, Ralf, Te, Yao, Uchino, Osamu, Velazco, Voltaire A

“…Since September 2014, NASA's Orbiting Carbon Observatory-2 (OCO-2) satellite has been taking measurements of reflected solar spectra and using them to infer…”
Get full text

The influence of humidity on the performance of a low-cost air particle mass sensor and the effect of atmospheric fog by Jayaratne, Rohan, Liu, Xiaoting, Thai, Phong, Dunbabin, Matthew, Morawska, Lidia

“…While low-cost particle sensors are increasingly being used in numerous applications, most of them have no heater or dryer at the inlet to remove water from…”
Get full text

Evaluation of a low-cost optical particle counter (Alphasense OPC-N2) for ambient air monitoring by Crilley, Leigh R, Shaw, Marvin, Pound, Ryan, Kramer, Louisa J, Price, Robin, Young, Stuart, Lewis, Alastair C, Pope, Francis D

“…A fast-growing area of research is the development of low-cost sensors for measuring air pollutants. The affordability and size of low-cost particle sensors…”
Get full text

Methane retrieved from TROPOMI: improvement of the data product and validation of the first 2 years of measurements by Lorente, Alba, Borsdorff, Tobias, Butz, Andre, Hasekamp, Otto, aan de Brugh, Joost, Schneider, Andreas, Wu, Lianghai, Hase, Frank, Kivi, Rigel, Wunch, Debra, Pollard, David F, Shiomi, Kei, Deutscher, Nicholas M, Velazco, Voltaire A, Roehl, Coleen M, Wennberg, Paul O, Warneke, Thorsten, Landgraf, Jochen

“…The TROPOspheric Monitoring Instrument (TROPOMI) on board the Sentinel 5 Precursor (S5-P) satellite provides methane (CH4) measurements with high accuracy and…”
Get full text

Comparisons of the Orbiting Carbon Observatory-2 (OCO-2) XCO2 measurements with TCCON by Wunch, Debra, Wennberg, Paul O, Osterman, Gregory, Fisher, Brendan, Naylor, Bret, Roehl, Coleen M, O'Dell, Christopher, Mandrake, Lukas, Viatte, Camille, Kiel, Matthäus, Griffith, David W T, Deutscher, Nicholas M, Velazco, Voltaire A, Notholt, Justus, Warneke, Thorsten, Petri, Christof, De Maziere, Martine, Sha, Mahesh K, Sussmann, Ralf, Rettinger, Markus, Pollard, David, Robinson, John, Morino, Isamu, Uchino, Osamu, Hase, Frank, Blumenstock, Thomas, Feist, Dietrich G, Arnold, Sabrina G, Strong, Kimberly, Mendonca, Joseph, Kivi, Rigel, Heikkinen, Pauli, Iraci, Laura, Podolske, James, Hillyard, Patrick W, Kawakami, Shuji, Dubey, Manvendra K, Parker, Harrison A, Sepulveda, Eliezer, García, Omaira E, Yao, Te, Jeseck, Pascal, Gunson, Michael R, Crisp, David, Eldering, Annmarie

“…NASA's Orbiting Carbon Observatory-2 (OCO-2) has been measuring carbon dioxide column-averaged dry-air mole fraction, XCO2, in the Earth's atmosphere for over…”
Get full text

Improving algorithms and uncertainty estimates for satellite NO2 retrievals: results from the quality assurance for the essential climate variables (QA4ECV) project by K Folkert Boersma, Eskes, Henk J, Richter, Andreas, De Smedt, Isabelle, Lorente, Alba, Beirle, Steffen, Jos H G M van Geffen, Zara, Marina, Peters, Enno, Michel Van Roozendael, Wagner, Thomas, Maasakkers, Joannes D, Ronald J van der A, Nightingale, Joanne, De Rudder, Anne, Irie, Hitoshi, Pinardi, Gaia, Jean-Christopher, Lambert, Compernolle, Steven C

“…Global observations of tropospheric nitrogen dioxide (NO2) columns have been shown to be feasible from space, but consistent multi-sensor records do not yet…”
Get full text

Comparison of TROPOMI/Sentinel-5 Precursor NO2 observations with ground-based measurements in Helsinki by Ialongo, Iolanda, Virta, Henrik, Eskes, Henk, Hovila, Jari, Douros, John

“…We present a comparison between satellite-based TROPOMI (TROPOspheric Monitoring Instrument) NO2 products and ground-based observations in Helsinki (Finland)…”
Get full text

Community Air Sensor Network (CAIRSENSE) project: evaluation of low-cost sensor performance in a suburban environment in the southeastern United States by Jiao, Wan, Hagler, Gayle, Williams, Ronald, Sharpe, Robert, Brown, Ryan, Garver, Daniel, Judge, Robert, Caudill, Motria, Rickard, Joshua, Davis, Michael, Weinstock, Lewis, Zimmer-Dauphinee, Susan, Buckley, Ken

“…Advances in air pollution sensor technology have enabled the development of small and low-cost systems to measure outdoor air pollution. The deployment of a…”
Get full text

The OCO-3 mission: measurement objectives and expected performance based on 1 year of simulated data by Eldering, Annmarie, Taylor, Thomas E., O'Dell, Christopher W., Pavlick, Ryan

“…The Orbiting Carbon Observatory-3 (OCO-3) is NASA's next instrument dedicated to extending the record of the dry-air mole fraction of column carbon dioxide…”
Get full text