Journal of Geophysical Research D: Atmospheres

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A new estimate of the China temperature anomaly series and uncertainty assessment in 1900–2006
Journal of Geophysical Research D: Atmospheres - Tập 119 Số 1 - Trang 1-9 - 2014
Jinfeng Wang, Chengdong Xu, Maogui Hu, Qinxiang Li, Zhongwei Yan, Ping Zhao, Phil Jones
AbstractWhile global warming during the last century has been well recognized, the magnitude of the climate warming in regions such as China over the past 100 years still has some uncertainty due to limited observations during the early years. Several series of temperature anomalies for the 20thcentury in China have been independently developed...... hiện toàn bộ
Theoretical and empirical scale dependency of Z‐R relationships: Evidence, impacts, and correction
Journal of Geophysical Research D: Atmospheres - Tập 118 Số 14 - Trang 7435-7449 - 2013
Sébastien Verrier, Laurent Barthès, Cécile Mallet
AbstractEstimation of rainfall intensities from radar measurements relies to a large extent on power‐laws relationships between rain rates R and radar reflectivities Z, i.e., Z = a*R^b. These relationships...... hiện toàn bộ
Tropical Cyclonic Rainfall in China: Changing Properties, Seasonality, and Causes
Journal of Geophysical Research D: Atmospheres - Tập 123 Số 9 - Trang 4476-4489 - 2018
Qiang Zhang, Yangchen Lai, Xihui Gu, Peijun Shi, Vijay P. Singh
AbstractUsing daily rainfall data from 1936 stations across China, this study investigated tropical cyclonic rainfall (TCR) changes during 1960–2014. The possible reasons behind TCR changes were examined using tracks and frequency of tropical cyclones (TCs) in both space and time. The highest annual TCR occur in coastal regions of east and southeast China (>500 ...... hiện toàn bộ
Estimating global black carbon emissions using a top‐down Kalman Filter approach
Journal of Geophysical Research D: Atmospheres - Tập 119 Số 1 - Trang 307-323 - 2014
Jason Blake Cohen, Chien Wang
AbstractBlack carbon (BC) is an important aerosol constituent in the atmosphere and climate forcer. A good understanding of the radiative forcing of BC and associated climate feedback and response is critical to minimize the uncertainty in predicting current and future climate influenced by anthropogenic aerosols. One reason for this uncertainty is that current emi...... hiện toàn bộ
CO Emissions Inferred From Surface CO Observations Over China in December 2013 and 2017
Journal of Geophysical Research D: Atmospheres - Tập 125 Số 7 - 2020
Shuzhuang Feng, Fei Jiang, Zheng Wu, Hengmao Wang, Weimin Ju, Haikun Wang
AbstractChina has implemented active clean air policies in recent years, and the spatiotemporal patterns of major pollutant emissions have changed substantially. In this study, we construct a regional air pollution data assimilation system based on the WRF/CMAQ model and ensemble Kalman filter algorithm to quantitatively optimize gridded CO emissions using hourly s...... hiện toàn bộ
Impact of inherent meteorology uncertainty on air quality model predictions
Journal of Geophysical Research D: Atmospheres - Tập 120 Số 23 - 2015
Robert C. Gilliam, Christian Hogrefe, James M. Godowitch, Sergey L. Napelenok, Rohit Mathur, S. Trivikrama Rao
AbstractIt is well established that there are a number of different classifications and sources of uncertainties in environmental modeling systems. Air quality models rely on two key inputs, namely, meteorology and emissions. When using air quality models for decision making, it is important to understand how uncertainties in these inputs affect the simulated conce...... hiện toàn bộ
Estimation of global black carbon direct radiative forcing and its uncertainty constrained by observations
Journal of Geophysical Research D: Atmospheres - Tập 121 Số 10 - Trang 5948-5971 - 2016
Rong Wang, Yves Balkanski, Oliviér Boucher, Philippe Ciais, Gregory L. Schuster, Frédéric Chevallier, B. H. Samset, Junfeng Liu, Shilong Piao, Myrto Valari, Shu Tao
AbstractBlack carbon (BC) contributes to global warming by absorbing sunlight. However, the size of this contribution, namely, the direct radiative forcing (RF), ranges from +0.1 to +1.0 W m−2, largely due to differences between bottom‐up and observation‐based estimates. Current global models systematically underestimate BC radiation absorption...... hiện toàn bộ
Sulfate Aerosol in the Arctic: Source Attribution and Radiative Forcing
Journal of Geophysical Research D: Atmospheres - Tập 123 Số 3 - Trang 1899-1918 - 2018
Yang Yang, Hailong Wang, Steven J. Smith, R. C. Easter, Philip J. Rasch
AbstractSource attribution of Arctic sulfate and its radiative forcing due to aerosol‐radiation interactions (RFari) for 2010–2014 are quantified in this study using the Community Earth System Model equipped with an explicit sulfur source‐tagging technique. The model roughly reproduces the seasonal pattern of sulfate but has biases in simulating the magnitude of ne...... hiện toàn bộ
An efficient hybrid method for estimating clear‐sky surface downward longwave radiation from MODIS data
Journal of Geophysical Research D: Atmospheres - Tập 122 Số 5 - Trang 2616-2630 - 2017
Jie Cheng, Shunlin Liang, Wenhui Wang, Yamin Guo
AbstractThis paper proposes an efficient hybrid method for estimating 1 km instantaneous clear‐sky surface downward longwave radiation (LWDN) from Moderate Resolution Imaging Spectroradiometer (MODIS) thermal infrared observations and the MODIS near‐infrared column water vapor (CWV) data product. The LWDN was formulated as a nonlinear function of surface upwelling ...... hiện toàn bộ
Comprehensive Assessment of Global Surface Net Radiation Products and Uncertainty Analysis
Journal of Geophysical Research D: Atmospheres - Tập 123 Số 4 - Trang 1970-1989 - 2018
Aolin Jia, Shunlin Liang, Bo Jiang, Xiaotong Zhang, Guoxin Wang
AbstractEarth surface net radiation (Rn) characterizes the surface radiation budget and plays a critical role in ecological, biogeochemical, and hydrological processes. The Rn products from remote sensing and reanalys...... hiện toàn bộ
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