4.7 Article

Occurrence of weak, sub-micron, tropospheric aerosol events at high Arctic latitudes

期刊

GEOPHYSICAL RESEARCH LETTERS
卷 35, 期 14, 页码 -

出版社

AMER GEOPHYSICAL UNION
DOI: 10.1029/2008GL033733

关键词

-

向作者/读者索取更多资源

Numerous fine mode (sub-micron) aerosol optical events were observed during the summer of 2007 at the High Arctic atmospheric observatory (PEARL) located at Eureka, Nunavut, Canada. Half of these events could be traced to forest fires in southern and eastern Russia and the Northwest Territories of Canada. The most notable findings were that (a) a combination of ground-based measurements (passive sunphotometry, high spectral resolution lidar) could be employed to determine that weak (near sub-visual) fine mode events had occurred, and (b) this data combined with remote sensing imagery products (MODIS, OMI-AI, FLAMBE fire sources), Fourier transform spectroscopy and back trajectories could be employed to identify the smoke events.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

Article Environmental Sciences

Tropospheric and Surface Nitrogen Dioxide Changes in the Greater Toronto Area during the First Two Years of the COVID-19 Pandemic

Xiaoyi Zhao, Vitali Fioletov, Ramina Alwarda, Yushan Su, Debora Griffin, Dan Weaver, Kimberly Strong, Alexander Cede, Thomas Hanisco, Martin Tiefengraber, Chris McLinden, Henk Eskes, Jonathan Davies, Akira Ogyu, Reno Sit, Ihab Abboud, Sum Chi Lee

Summary: This study examines the changes in tropospheric nitrogen dioxide (NO2) observed in the Greater Toronto Area (GTA), Canada, during the first two years of the COVID-19 pandemic. The researchers compare the NO2 measurements from the Canadian Pandora measurement program with surface NO2 concentrations obtained through in situ instruments to assess the local emission changes. The study finds a significant reduction in NO2 levels, especially in downtown Toronto and airport areas, during the pandemic. While the NO2 levels in 2021 have started to recover, they remain below the pre-pandemic levels. The study also highlights the importance of considering long-term trends in NO2 and the use of wind-based validation methods.

REMOTE SENSING (2022)

Editorial Material Astronomy & Astrophysics

Geoscience Education Perspectives on Integrated, Coordinated, Open, Networked (ICON) Science

Sarah K. Fortner, Cathryn A. Manduca, Hendratta N. Ali, Casey M. Saup, Samuel C. Nyarko, Shannon Othus-Gault, Viranga Perera, Vincent C. H. Tong, Anne U. Gold, Tanya Furman, Leilani Arthurs, Bridget K. Mulvey, Kristen St. John, Joel G. Singley, Elijah Thomas Johnson, Molly Witter, Rebecca L. Batchelor, Deron T. Carter, M. Chantale Damas, Lynsey LeMay, Karen M. Layou, Russanne Low, Hui Hui Wang, Kai Olson-Sawyer, Amy Pallant, Katherine Ryker, Laura Lukes, Nicole LaDue, Katherine Ryker, Kaatje J. van der Hoeven Kraft

Summary: Practitioners and researchers in geoscience education advocate for collaboration using ICON principles and approaches, which enhance resource sharing, expand capacity, and promote equity and global engagement in geoscience education.

EARTH AND SPACE SCIENCE (2022)

Article Physics, Atomic, Molecular & Chemical

Measurements of perfluoro-n-heptane and perfluoro-n-octane absorption cross-sections from 300 to 350 K

Muhammad Osama Ishtiak, Orfeo Colebatch, Karine Le Bris, Paul J. Godin, Kimberly Strong

Summary: Perfluoroalkanes are fully fluorinated greenhouse gases with long atmospheric lifetimes. Despite regulation, their concentrations have continued to increase. This study provides spectral data for perfluoro-n-heptane and perfluoro-n-octane to calculate climate metrics. The results show agreement with literature values and reveal no significant temperature dependence.

JOURNAL OF MOLECULAR SPECTROSCOPY (2023)

Article Meteorology & Atmospheric Sciences

Exceptional Wildfire Enhancements of PAN, C2H4, CH3OH, and HCOOH Over the Canadian High Arctic During August 2017

T. Wizenberg, K. Strong, D. B. A. Jones, E. Lutsch, E. Mahieu, B. Franco, L. Clarisse

Summary: During August 17-22, 2017, significant increases in the total columns of CO, PAN, C2H4, CH3OH, and HCOOH were observed in the Canadian high Arctic, which were attributed to wildfires in British Columbia and the Northwest Territories of Canada. The emission factors of C2H4 and HCOOH were found to be higher than previous studies, indicating unusually high emissions from these fires. Simulations using the GEOS-Chem model showed that adjusting the injection heights significantly improved the agreement between model results and observations.

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES (2023)

Article Geosciences, Multidisciplinary

Network for the Detection of Atmospheric Composition Change (NDACC) Fourier transform infrared (FTIR) trace gas measurements at the University of Toronto Atmospheric Observatory from 2002 to 2020

Shoma Yamanouchi, Stephanie Conway, Kimberly Strong, Orfeo Colebatch, Erik Lutsch, Sebastien Roche, Jeffrey Taylor, Cynthia H. Whaley, Aldona Wiacek

Summary: This study presents 19 years of atmospheric composition measurements obtained from the University of Toronto Atmospheric Observatory using FTIR technology. The data, including 14 different species, have been archived and made publicly available, highlighting the scientific significance of this research.

EARTH SYSTEM SCIENCE DATA (2023)

Article Environmental Sciences

Anomalies of O3, CO, C2H2, H2CO, and C2H6 detected with multiple ground-based Fourier-transform infrared spectrometers and assessed with model simulation in 2020: COVID-19 lockdowns versus natural variability

Ivan Ortega, Benjamin Gaubert, James W. Hannigan, Guy Brasseur, Helen M. Worden, Thomas Blumenstock, Hao Fu, Frank Hase, Pascal Jeseck, Nicholas Jones, Cheng Liu, Emmanuel Mahieu, Isamu Morino, Isao Murata, Justus Notholt, Mathias Palm, Amelie Roehling, Yao Te, Kimberly Strong, Youwen Sun, Shoma Yamanouchi

Summary: This study quantifies the anomalies of tropospheric ozone (O3), carbon monoxide (CO), acetylene (C2H2), formaldehyde (H2CO), and ethane (C2H6) during the global COVID-19 lockdown using ground-based Fourier-transform infrared spectrometers. The results show a decrease in tropospheric ozone and formaldehyde, as well as a mixed response in carbon monoxide depending on the location. The simulations reproduce these anomalies and suggest that natural variability plays a significant role.

ELEMENTA-SCIENCE OF THE ANTHROPOCENE (2023)

Article Geosciences, Multidisciplinary

National CO2 budgets (2015-2020) inferred from atmospheric CO2 observations in support of the global stocktake

Brendan Byrne, David F. Baker, Sourish Basu, Michael Bertolacci, Kevin W. Bowman, Dustin Carroll, Abhishek Chatterjee, Frederic Chevallier, Philippe Ciais, Noel Cressie, David Crisp, Sean Crowell, Feng Deng, Zhu Deng, Nicholas M. Deutscher, Manvendra K. Dubey, Sha Feng, Omaira E. Garcia, David W. T. Griffith, Benedikt Herkommer, Lei Hu, Andrew R. Jacobson, Rajesh Janardanan, Sujong Jeong, Matthew S. Johnson, Dylan B. A. Jones, Rigel Kivi, Junjie Liu, Zhiqiang Liu, Shamil Maksyutov, John B. Miller, Scot M. Miller, Isamu Morino, Justus Notholt, Tomohiro Oda, Christopher W. O'Dell, Young-Suk Oh, Hirofumi Ohyama, Prabir K. Patra, Helene Peiro, Christof Petri, Sajeev Philip, David F. Pollard, Benjamin Poulter, Marine Remaud, Andrew Schuh, Mahesh K. Sha, Kei Shiomi, Kimberly Strong, Colm Sweeney, Yao Te, Hanqin Tian, Voltaire A. Velazco, Mihalis Vrekoussis, Thorsten Warneke, John R. Worden, Debra Wunch, Yuanzhi Yao, Jeongmin Yun, Andrew Zammit-Mangion, Ning Zeng

Summary: Accurate accounting of CO2 emissions and removals is crucial for emission reduction targets, and this study provides a pilot dataset of net carbon exchange and terrestrial carbon stock changes for different countries to inform carbon budgets. The estimates are based on top-down modeling outputs using OCO-2 data, combined with bottom-up estimates of fossil fuel emissions and lateral carbon fluxes. Increases in terrestrial carbon stocks are observed, particularly in the northern extra tropics, while the tropics show variable stock losses. The study discusses the current state and future developments of top-down monitoring and verification systems for tracking emissions and removals.

EARTH SYSTEM SCIENCE DATA (2023)

Article Meteorology & Atmospheric Sciences

Using portable low-resolution spectrometers to evaluate Total Carbon Column Observing Network (TCCON) biases in North America

Nasrin Mostafavi Pak, Jacob K. Hedelius, Sebastien Roche, Liz Cunningham, Bianca Baier, Colm Sweeney, Coleen Roehl, Joshua Laughner, Geoffrey Toon, Paul Wennberg, Harrison Parker, Colin Arrowsmith, Joseph Mendonca, Pierre Fogal, Tyler Wizenberg, Beatriz Herrera, Kimberly Strong, Kaley A. Walker, Felix Vogel, Debra Wunch

Summary: EM27/SUN devices are portable solar-viewing Fourier transform spectrometers used widely for greenhouse gas measurements. In a 6-week-long campaign, the devices were taken to five TCCON stations to evaluate their performance and constrain site-to-site bias. New data products were developed using previous and current versions of the retrieval algorithm. The measurements remained consistent with each other, and biases were reduced in the newer version, except for CO measurements influenced by urban emissions.

ATMOSPHERIC MEASUREMENT TECHNIQUES (2023)

Article Meteorology & Atmospheric Sciences

A comparison of carbon monoxide retrievals between the MOPITT satellite and Canadian high-Arctic ground-based NDACC and TCCON FTIR measurements

Ali Jalali, Kaley A. Walker, Kimberly Strong, Rebecca R. Buchholz, Merritt N. Deeter, Debra Wunch, Sebastien Roche, Tyler Wizenberg, Erik Lutsch, Erin McGee, Helen M. Worden, Pierre Fogal, James R. Drummond

Summary: This study validates the measurements of MOPITT version 8 using FTIR measurements from a laboratory in Canada. The results show overall consistency between MOPITT and the other two measurement systems.

ATMOSPHERIC MEASUREMENT TECHNIQUES (2022)

Article Environmental Sciences

Measurement report: Evolution and distribution of NH3 over Mexico City from ground-based and satellite infrared spectroscopic measurements

Beatriz Herrera, Alejandro Bezanilla, Thomas Blumenstock, Enrico Dammers, Frank Hase, Lieven Clarisse, Adolfo Magaldi, Claudia Rivera, Wolfgang Stremme, Kimberly Strong, Camille Viatte, Martin Van Damme, Michel Grutter

Summary: Ammonia (NH3) is the most abundant alkaline compound in the atmosphere, and its presence has significant implications for the environment, human health, and radiative forcing. This study focused on measuring atmospheric NH3 over Mexico City from 2012 to 2020 using ground-based solar absorption spectroscopy and satellite observations. The results showed differences in the diurnal variability of NH3 between urban and remote sites, with urban sources being the primary contributor. The study also revealed the influence of the boundary layer and temperature on the seasonal and diurnal patterns of NH3. The comparison between the FTIR and IASI data highlighted the underestimation of NH3 total columns by the satellite instrument. The spatial distribution of NH3 indicated higher concentrations in the northeast part of the city. Overall, the study observed an increasing trend in NH3 total columns over Mexico City, with different rates depending on the location and measurement method.

ATMOSPHERIC CHEMISTRY AND PHYSICS (2022)

Article Environmental Sciences

NH3 spatiotemporal variability over Paris, Mexico City, and Toronto, and its link to PM2.5 during pollution events

Camille Viatte, Rimal Abeed, Shoma Yamanouchi, William C. Porter, Sarah Safieddine, Martin Van Damme, Lieven Clarisse, Beatriz Herrera, Michel Grutter, Pierre-Francois Coheur, Kimberly Strong, Cathy Clerbaux

Summary: This study investigates ammonia (NH3) pollution in the cities of Paris, Mexico, and Toronto, finding a correlation between temperature and NH3 concentration. It also analyzes the NH3 transport and pollution events in these cities.

ATMOSPHERIC CHEMISTRY AND PHYSICS (2022)

Article Meteorology & Atmospheric Sciences

Synergetic use of IASI profile and TROPOMI total-column level 2 methane retrieval products

Matthias Schneider, Benjamin Ertl, Qiansi Tu, Christopher J. Diekmann, Farahnaz Khosrawi, Amelie N. Roehling, Frank Hase, Darko Dubravica, Omaira E. Garcia, Eliezer Sepulveda, Tobias Borsdorff, Jochen Landgraf, Alba Lorente, Andre Butz, Huilin Chen, Rigel Kivi, Thomas Laemmel, Michel Ramonet, Cyril Crevoisier, Jerome Pernin, Martin Steinbacher, Frank Meinhardt, Kimberly Strong, Debra Wunch, Thorsten Warneke, Coleen Roehl, Paul O. Wennberg, Isamu Morino, Laura T. Iraci, Kei Shiomi, Nicholas M. Deutscher, David W. T. Griffith, Voltaire A. Velazco, David F. Pollard

Summary: The article presents a method for the synergetic use of IASI profile and TROPOMI total-column level 2 retrieval products, which combines the advantages of thermal infrared and scattered solar radiation observation data. The method is successfully validated for atmospheric methane (CH4) detection, showing reliable results compared to reference data from various measurement stations.

ATMOSPHERIC MEASUREMENT TECHNIQUES (2022)

Article Meteorology & Atmospheric Sciences

Retrieval of greenhouse gases from GOSAT and GOSAT-2 using the FOCAL algorithm

Stefan Noel, Maximilian Reuter, Michael Buchwitz, Jakob Borchardt, Michael Hilker, Oliver Schneising, Heinrich Bovensmann, John P. Burrows, Antonio Di Noia, Robert J. Parker, Hiroshi Suto, Yukio Yoshida, Matthias Buschmann, Nicholas M. Deutscher, Dietrich G. Feist, David W. T. Griffith, Frank Hase, Rigel Kivi, Cheng Liu, Isamu Morino, Justus Notholt, Young-Suk Oh, Hirofumi Ohyama, Christof Petri, David F. Pollard, Markus Rettinger, Coleen Roehl, Constantina Rousogenous, Mahesh Kumar Sha, Kei Shiomi, Kimberly Strong, Ralf Sussmann, Yao Te, Voltaire A. Velazco, Mihalis Vrekoussis, Thorsten Warneke

Summary: This study applies the updated version of the Fast atmOspheric traCe gAs retrievaL (FOCAL) method to measurements from the Greenhouse gases Observing SATellite (GOSAT) and its successor GOSAT-2. The study focuses on estimating methane, water vapor, and the ratio of semi-heavy water to water vapor, and also presents preliminary results for carbon monoxide and nitrous oxide. The updated FOCAL retrieval method significantly increases the number of valid data for carbon dioxide measurements, and shows reasonable spatial distribution and temporal variations.

ATMOSPHERIC MEASUREMENT TECHNIQUES (2022)

Article Meteorology & Atmospheric Sciences

Ground-based validation of the MetOp-A and MetOp-B GOME-2 OClO measurements

Gaia Pinardi, Michel Van Roozendael, Francois Hendrick, Andreas Richter, Pieter Valks, Ramina Alwarda, Kristof Bognar, Udo Friess, Jose Granville, Myojeong Gu, Paul Johnston, Cristina Prados-Roman, Richard Querel, Kimberly Strong, Thomas Wagner, Folkard Wittrock, Margarita Yela Gonzalez

Summary: This paper reports on the validation of atmospheric OClO data using both ground-based and satellite measurements, showing good agreement in terms of inter-annual variability and seasonal behavior.

ATMOSPHERIC MEASUREMENT TECHNIQUES (2022)

Article Geosciences, Multidisciplinary

An 11-year record of XCO2 estimates derived from GOSAT measurements using the NASA ACOS version 9 retrieval algorithm

Thomas E. Taylor, Christopher W. O'Dell, David Crisp, Akhiko Kuze, Hannakaisa Lindqvist, Paul O. Wennberg, Abhishek Chatterjee, Michael Gunson, Annmarie Eldering, Brendan Fisher, Matthaus Kiel, Robert R. Nelson, Aronne Merrelli, Greg Osterman, Frederic Chevallier, Paul Palmer, Liang Feng, Nicholas M. Deutscher, Manvendra K. Dubey, Dietrich G. Feist, Omaira E. Garcia, David W. T. Griffith, Frank Hase, Laura T. Iraci, Rigel Kivi, Cheng Liu, Martine De Maziere, Isamu Morino, Justus Notholt, Young-Suk Oh, Hirofumi Ohyama, David F. Pollard, Markus Rettinger, Matthias Schneider, Coleen M. Roehl, Mahesh Kumar Sha, Kei Shiomi, Kimberly Strong, Ralf Sussmann, Yao Te, Voltaire A. Velazco, Mihalis Vrekoussis, Thorsten Warneke, Debra Wunch

Summary: This article introduces the estimation of carbon dioxide concentration using TANSO-FTS measurement data and performs bias correction and quality filtering. The test results show that the v9 ACOS GOSAT XCO2 product has improved and is consistent with other measurement data. The use of this dataset can provide valuable reference for carbon cycle research.

EARTH SYSTEM SCIENCE DATA (2022)

暂无数据