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Relaxation of Wind Stress Drives the Abrupt Onset of Biological Carbon Uptake in the Kerguelen Bloom: A Multisensor Approach 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (9)
作者:  Pellichero, Violaine;  Boutin, Jacqueline;  Claustre, Herve;  Merlivat, Liliane;  Sallee, Jean-baptiste;  Blain, Stephane
收藏  |  浏览/下载:21/0  |  提交时间:2020/07/02
onset of the phytoplankton bloom  mixing-layer depth  in situ high-resolution data  mixed-layer depth  air-sea heat flux  wind stress  
An evaluation of the interaction of morning residual layer ozone and mixing layer ozone in rural areas of the North China Plain 期刊论文
ATMOSPHERIC RESEARCH, 2020, 236
作者:  Zhu, Xiaowan;  Ma, Zhiqiang;  Qiu, Yulu;  Liu, Hui;  Liu, Quan;  Yin, Xiaomei
收藏  |  浏览/下载:24/0  |  提交时间:2020/07/02
Ozone  North China Plain  Residual layer  Vertical mixing  
Rapid growth of new atmospheric particles by nitric acid and ammonia condensation 期刊论文
NATURE, 2020, 581 (7807) : 184-+
作者:  Liang, Guanxiang;  Zhao, Chunyu;  Zhang, Huanjia;  Mattei, Lisa;  Sherrill-Mix, Scott;  Bittinger, Kyle;  Kessler, Lyanna R.;  Wu, Gary D.;  Baldassano, Robert N.;  DeRusso, Patricia;  Ford, Eileen;  Elovitz, Michal A.;  Kelly, Matthew S.;  Patel, Mohamed Z.;  Mazhani, Tiny;  Gerber, Jeffrey S.;  Kelly, Andrea;  Zemel, Babette S.;  Bushman, Frederic D.
收藏  |  浏览/下载:41/0  |  提交时间:2020/05/20

A list of authors and their affiliations appears at the end of the paper New-particle formation is a major contributor to urban smog(1,2), but how it occurs in cities is often puzzling(3). If the growth rates of urban particles are similar to those found in cleaner environments (1-10 nanometres per hour), then existing understanding suggests that new urban particles should be rapidly scavenged by the high concentration of pre-existing particles. Here we show, through experiments performed under atmospheric conditions in the CLOUD chamber at CERN, that below about +5 degrees Celsius, nitric acid and ammonia vapours can condense onto freshly nucleated particles as small as a few nanometres in diameter. Moreover, when it is cold enough (below -15 degrees Celsius), nitric acid and ammonia can nucleate directly through an acid-base stabilization mechanism to form ammonium nitrate particles. Given that these vapours are often one thousand times more abundant than sulfuric acid, the resulting particle growth rates can be extremely high, reaching well above 100 nanometres per hour. However, these high growth rates require the gas-particle ammonium nitrate system to be out of equilibrium in order to sustain gas-phase supersaturations. In view of the strong temperature dependence that we measure for the gas-phase supersaturations, we expect such transient conditions to occur in inhomogeneous urban settings, especially in wintertime, driven by vertical mixing and by strong local sources such as traffic. Even though rapid growth from nitric acid and ammonia condensation may last for only a few minutes, it is nonetheless fast enough to shepherd freshly nucleated particles through the smallest size range where they are most vulnerable to scavenging loss, thus greatly increasing their survival probability. We also expect nitric acid and ammonia nucleation and rapid growth to be important in the relatively clean and cold upper free troposphere, where ammonia can be convected from the continental boundary layer and nitric acid is abundant from electrical storms(4,5).


  
The Subsurface Mode Tropical Instability Waves in the Equatorial Pacific Ocean and Their Impacts on Shear and Mixing 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (21) : 12270-12278
作者:  Liu, Chuanyu;  Fang, Liyuan;  Koehl, Armin;  Liu, Zhiyu;  Smyth, William D.;  Wang, Fan
收藏  |  浏览/下载:19/0  |  提交时间:2020/02/17
tropical instability waves  second baroclinic mode  subsurface  upper core layer  mixing  equatorial Pacific  
Synergistic effect of the occurrence of African dust outbreaks on atmospheric pollutant levels in the Madrid metropolitan area 期刊论文
ATMOSPHERIC RESEARCH, 2019, 226: 208-218
作者:  Salvador, Pedro;  Molero, Francisco;  Javier Fernandez, Alfonso;  Tobias, Aurelio;  Pandolfi, Marco;  Javier Gomez-Moreno, Francisco;  Barreiro, Marcos;  Perez, Noemi;  Martinez Marco, Isabel;  Aranzazu Revuelta, Maria;  Querol, Xavier;  Artinano, Begona
收藏  |  浏览/下载:33/0  |  提交时间:2019/11/27
African dust outbreaks  Mixing layer height  PM10  Health effects  
Characteristics of Heavy Particulate Matter Pollution Events Over Hong Kong and Their Relationships With Vertical Wind Profiles Using High-Time-Resolution Doppler Lidar Measurements 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019, 124 (16) : 9609-9623
作者:  Yang, Yuanjian;  Yim, Steve H. L.;  Haywood, Jim;  Osborne, Martin;  Chan, Jazz C. S.;  Zeng, Zhaoliang;  Cheng, Jack C. H.
收藏  |  浏览/下载:23/0  |  提交时间:2019/11/27
PM pollution  transport  Doppler lidar  vertical wind profile  mixing layer height  
Global Stokes Drift Climate under the RCP8.5 Scenario 期刊论文
JOURNAL OF CLIMATE, 2019, 32 (6) : 1677-1691
作者:  Breivik, Oyvind;  Carrasco, Ana;  Staneva, Joanna;  Behrens, Arno;  Semedo, Alvaro;  Bidlot, Jean-Raymond;  Aarnes, Ole Johan
收藏  |  浏览/下载:16/0  |  提交时间:2019/04/09
Wave properties  Waves, oceanic  Mixing  Oceanic mixed layer  Climate models  Ocean models  
Characterizing the influence of the marine stratocumulus cloud on the land fog at the Atacama Desert 期刊论文
ATMOSPHERIC RESEARCH, 2018, 214: 109-120
作者:  Lobos Roco, Felipe;  Vila-Guerau de Arellano, Jordi;  Pedruzo-Bagazgoitia, Xabier
收藏  |  浏览/下载:29/0  |  提交时间:2019/04/09
Fog  Stratocumulus cloud  Atacama Desert  Atmospheric boundary layer  Liquid water mixing ratio  
A Lagrangian Model Diagnosis of Stratospheric Contributions to Tropical Midtropospheric Air 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2018, 123 (17) : 9764-9785
作者:  Tao, M.;  Pan, L. L.;  Konopka, P.;  Honomichl, S. B.;  Kinnison, D. E.;  Apel, E. C.
收藏  |  浏览/下载:12/0  |  提交时间:2019/04/09
CONTRAST  isentropic mixing  high ozone and low water vapor layer  STE  CLaMS  biomass burning  
The spatial representativeness of mixing layer height observations in the North China Plain 期刊论文
ATMOSPHERIC RESEARCH, 2018, 209: 204-211
作者:  Zhu, Xiaowan;  Tang, Guiqian;  Lv, Feng;  Hu, Bo;  Cheng, Mengtian;  Muenkel, Christoph;  Schafer, Klaus;  Xin, Jinyuan;  An, Xingqin;  Wang, Guocheng;  Li, Xin;  Wang, Yuesi
收藏  |  浏览/下载:24/0  |  提交时间:2019/04/09
Ceilometer  Mixing layer height  Observation site layout  North China plain