Article
Meteorology & Atmospheric Sciences
Lu Zhang, Jing Li, Zhongjing Jiang, Yueming Dong, Tong Ying, Zhenyu Zhang
Summary: This study investigates the uncertainty of anthropogenic aerosol's direct perturbation on Earth's energy balance, focusing on the aerosol vertical distribution. The research finds that the difference in aerosol vertical profiles contributes to around 20% of the total uncertainty in direct aerosol radiative forcing.
JOURNAL OF CLIMATE
(2022)
Article
Meteorology & Atmospheric Sciences
Lu Zhang, Jing Li, Zhongjing Jiang, Yueming Dong, Tong Ying, Zhenyu Zhang
Summary: The direct perturbation of anthropogenic aerosols on Earth's energy balance (DARF) is uncertain, and this study investigates the intermodel spread of DARF across 14 global models within phase 6 of the Coupled Model Intercomparison Project (CMIP6). The results show that aerosol optical properties, including aerosol optical depth (AOD) and single scattering albedo (SSA), play an important role in DARF estimation.
JOURNAL OF CLIMATE
(2022)
Article
Meteorology & Atmospheric Sciences
Nadir Jeevanjee, Jacob T. Seeley, David Paynter, Stephan Fueglistaler
Summary: Clear-sky CO2 forcing varies significantly globally, primarily influenced by surface temperature, stratospheric temperature, and column relative humidity. The difference in forcing between regions is mainly due to the surface-stratosphere temperature contrast. In tropical and midlatitude regions, the presence of water vapor modulates the forcing by affecting atmospheric emissions.
JOURNAL OF CLIMATE
(2021)
Article
Environmental Sciences
Dandan Zhao, Jinyuan Xin, Chongshui Gong, Jiannong Quan, Yuesi Wang, Guiqian Tang, Yongxiang Ma, Lindong Dai, Xiaoyan Wu, Guangjing Liu, Yongjing Ma
Summary: This study explores the relationship between PM pollution and ABL structure, finding that ABL structure changes are closely related to PM levels and ARF. The research also identifies for the first time that once the ARF threshold exceeds approximately 55 W m(-2), the ABL structure tends to stabilize.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Multidisciplinary Sciences
Casey J. Wall, Joel R. Norris, Anna Possner, Daniel T. Mccoy, Isabel L. Mccoy, Nicholas J. Lutsko
Summary: This study quantifies the relationship between anthropogenic sulfate aerosols and low-level clouds using satellite observations, and estimates the range of equilibrium climate sensitivity (ECS) by constraining the associated radiative forcing. The results indicate that the uncertainty in aerosol forcing is smaller and ECS may be larger than previously assessed.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geosciences, Multidisciplinary
Lukas Kluft, Sally Dacie, Manfred Brath, Stefan A. Buehler, Bjorn Stevens
Summary: This study quantifies the temperature-dependence of clear-sky climate sensitivity using a one-dimensional model, highlighting potential errors in radiation schemes that can impact climate sensitivity. Line-by-line simulations show that there is no strengthening of the longwave radiative feedback within certain temperature ranges, with a slight decrease in climate sensitivity attributed to water vapor masking radiative forcing at the flanks of the CO2 absorption band.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Review
Geochemistry & Geophysics
Daniel Rosenfeld, Alexander Kokhanovsky, Tom Goren, Edward Gryspeerdt, Otto Hasekamp, Hailing Jia, Anton Lopatin, Johannes Quaas, Zengxin Pan, Odran Sourdeval
Summary: Atmospheric aerosols have a significant impact on the Earth's climate, particularly in the formation of cloud droplets. These particles, many of which are generated by human activity, influence the microphysical and radiative properties of clouds on a global scale, leading to important climatic effects. The effective radiative forcing due to aerosol-cloud interaction (ERFaci) offsets approximately 1/4 of the warming caused by greenhouse gases, although the uncertainty is relatively high. The ERFaci is typically calculated by multiplying the sensitivity of cloud radiative effects to aerosol changes by the anthropogenic aerosol concentration change, integrated over all cloud regimes.
REVIEWS OF GEOPHYSICS
(2023)
Article
Meteorology & Atmospheric Sciences
Stefan A. Buehler, Manfred Brath, Oliver Lemke, Oivind Hodnebrog, Robert Pincus, Patrick Eriksson, Iouli Gordon, Richard Larsson
Summary: The article introduces a new model for the infrared absorption of chlorofluorocarbons and other gases based on a high-resolution transmission molecular absorption database. The model is simple, traceable, and has important applications in remote sensing and global circulation models.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Remote Sensing
Zhenwei Shi, Zhaoxu Zhang, Wei Chen, Yi Lin
Summary: This study estimated the aerosol direct radiative effects (ADREs) for clear-sky conditions using CALIPSO observations and radiative transfer model. Parametric sensitivity analysis was performed to evaluate the uncertainties in ADREs due to aerosol optical properties and surface albedo errors. The results showed significant seasonal variability of ADREs in regions with higher dust, pollution, and smoke aerosol loading.
INTERNATIONAL JOURNAL OF REMOTE SENSING
(2022)
Article
Instruments & Instrumentation
Xin Nie, Qianjun Mao
Summary: The study focuses on the radiative transfer of polydisperse aerosols, using a new MCRT program to improve calculation accuracy and analyzing the effects of different input parameters on radiative transfer and scattering order. Results show that the new method has higher absorptivity and significant differences compared to the traditional method as the complex refractive index changes, with transmissivity curve exhibiting extremum variations.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Pengfei Yu, Robert W. Portmann, Yifeng Peng, Cheng-Cheng Liu, Yunqian Zhu, Elizabeth Asher, Zhixuan Bai, Ye Lu, Jianchun Bian, Michael Mills, Anja Schmidt, Karen H. Rosenlof, Owen B. Toon
Summary: Volcanic and wildfire events between 2014 and 2022 injected 3.2 Tg of sulfur dioxide and 0.8 Tg of smoke aerosols into the stratosphere. The simulated stratospheric lifetime of the injections during this period is 50% longer than previous volcanic injections. These injections resulted in a global mean effective radiative forcing of -0.18 W m(-2), which is 40% of the radiative forcing caused by the Pinatubo eruption. The smoke aerosols from wildfires have a greater negative radiative forcing compared to volcanic sulfate.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Jacob T. Seeley, Nadir Jeevanjee
Summary: Recent studies have identified a peak in equilibrium climate sensitivity (ECS) at a surface temperature of about 310K, which is attributed to interactions between H2O and CO2 in the longwave spectrum and moist-adiabatic amplification of upper-tropospheric warming.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Meteorology & Atmospheric Sciences
Tyler J. Thorsen, David M. Winker, Richard A. Ferrare
Summary: This study quantified the lower bound of uncertainty in observational estimates of global aerosol direct radiative effect and direct radiative forcing, finding that most previous studies have underestimated the uncertainty. The potential reduction in observational uncertainty with future satellite observations leveraging aerosol typing and refined vertical information was also discussed.
JOURNAL OF CLIMATE
(2021)
Article
Green & Sustainable Science & Technology
Eugenia Paulescu, Marius Paulescu
Summary: The new broadband parametric clear-sky solar irradiance model balances accuracy and accessibility, incorporating innovative elements and showing good estimates comparable to a current benchmark in clear-sky solar irradiance modeling during practical testing.
Article
Geosciences, Multidisciplinary
J. S. Wan, D. S. Hamilton, N. M. Mahowald
Summary: Uncertainty in preindustrial aerosol emissions, particularly from fires, significantly impacts the estimation of anthropogenic radiative forcing. Variations in the location and magnitude of fire emissions can lead to significant changes in aerosol forcing, both in direct radiative forcing and cloud albedo forcing. Altering the spatial distribution of preindustrial fires for a fixed magnitude introduces a previously unaccounted uncertainty to the total aerosol radiative forcing range.
GEOPHYSICAL RESEARCH LETTERS
(2021)