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Disentangling the Microphysical Effects of Fire Particles on Convective Clouds Through A Case Study 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (12)
作者:  Takeishi, Azusa;  Storelvmo, Trude;  Fierce, Laura
收藏  |  浏览/下载：13/0  |  提交时间：2020/08/18
aerosol-cloud interaction  aerosol activation  WRF-CHEM  
Ice Breakup Controls Dissipation of Wind Waves Across Southern Ocean Sea Ice 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (13)
作者:  Ardhuin, Fabrice;  Otero, Mark;  Merrifield, Sophia;  Grouazel, Antoine;  Terrill, Eric
收藏  |  浏览/下载：7/0  |  提交时间：2020/06/16
sea ice  ocean waves  SAR  
Hydrothermal (NN)-N-15-N-15 abundances constrain the origins of mantle nitrogen 期刊论文
NATURE, 2020, 580 (7803) : 367-+
作者:  Zhao, Steven;  Jang, Cholsoon;  Liu, Joyce;  Uehara, Kahealani;  Gilbert, Michael;  Izzo, Luke;  Zeng, Xianfeng;  Trefely, Sophie;  Fernandez, Sully;  Carrer, Alessandro;  Miller, Katelyn D.;  Schug, Zachary T.;  Snyder, Nathaniel W.;  Gade, Terence P.;  Titchenell, Paul M.;  Rabinowitz, Joshua D.;  Wellen, Kathryn E.
收藏  |  浏览/下载：14/0  |  提交时间：2020/05/13

Nitrogen is the main constituent of the Earth'  s atmosphere, but its provenance in the Earth'  s mantle remains uncertain. The relative contribution of primordial nitrogen inherited during the Earth'  s accretion versus that subducted from the Earth'  s surface is unclear(1-6). Here we show that the mantle may have retained remnants of such primordial nitrogen. We use the rare (NN)-N-15-N-15 isotopologue of N-2 as a new tracer of air contamination in volcanic gas effusions. By constraining air contamination in gases from Iceland, Eifel (Germany) and Yellowstone (USA), we derive estimates of mantle delta N-15 (the fractional difference in N-15/N-14 from air), N-2/Ar-36 and N-2/He-3. Our results show that negative delta N-15 values observed in gases, previously regarded as indicating a mantle origin for nitrogen(7-10), in fact represent dominantly air-derived N-2 that experienced N-15/N-14 fractionation in hydrothermal systems. Using two-component mixing models to correct for this effect, the (NN)-N-15-N-15 data allow extrapolations that characterize mantle endmember delta N-15, N-2/Ar-36 and N-2/He-3 values. We show that the Eifel region has slightly increased delta N-15 and N-2/Ar-36 values relative to estimates for the convective mantle provided by mid-ocean-ridge basalts(11), consistent with subducted nitrogen being added to the mantle source. In contrast, we find that whereas the Yellowstone plume has delta N-15 values substantially greater than that of the convective mantle, resembling surface components(12-15), its N-2/Ar-36 and N-2/He-3 ratios are indistinguishable from those of the convective mantle. This observation raises the possibility that the plume hosts a primordial component. We provide a test of the subduction hypothesis with a two-box model, describing the evolution of mantle and surface nitrogen through geological time. We show that the effect of subduction on the deep nitrogen cycle may be less important than has been suggested by previous investigations. We propose instead that high mid-ocean-ridge basalt and plume delta N-15 values may both be dominantly primordial features.


  
Radiative absorption enhancements by black carbon controlled by particle-to-particle heterogeneity in composition 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (10) : 5196-5203
作者:  Fierce, Laura;  Onasch, Timothy B.;  Cappa, Christopher D.;  Mazzoleni, Claudio;  China, Swarup;  Bhandari, Janarjan;  Davidovits, Paul;  Al Fischer, D.;  Helgestad, Taylor;  Lambe, Andrew T.;  Sedlacek, Arthur J., III;  Smith, Geoffrey D.;  Wolff, Lindsay
收藏  |  浏览/下载：8/0  |  提交时间：2020/05/13
black carbon  direct radiative forcing  absorption enhancement  aerosol mixing state  
The Impact of an Intense Cyclone on Short-Term Sea Ice Loss in a Fully Coupled Atmosphere-Ocean-Ice Model 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (4)
作者:  Stern, Daniel P.;  Doyle, James D.;  Barton, Neil P.;  Finocchio, Peter M.;  Komaromi, William A.;  Metzger, E. Joseph
收藏  |  浏览/下载：6/0  |  提交时间：2020/07/02
The Impact of Turbulent Diffusion Driven by Fog-Top Cooling on Sea Fog Development 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (4)
作者:  Yang, Yue;  Gao, Shanhong
收藏  |  浏览/下载：5/0  |  提交时间：2020/07/02
Exploring Impacts of Size-Dependent Evaporation and Entrainment in a Global Model 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (4)
作者:  Karset, I. H. H.;  Gettelman, A.;  Storelvmo, T.;  Alterskjaer, K.;  Berntsen, T. K.
收藏  |  浏览/下载：6/0  |  提交时间：2020/07/02
On the relationship between Atlantic meridional overturning circulation slowdown and global surface warming 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (2)
作者:  Caesar, L.;  Rahmstorf, S.;  Feulner, G.
收藏  |  浏览/下载：9/0  |  提交时间：2020/07/02
Atlantic meridional overturning circulation  global surface warming  ocean heat uptake  
Direct Radiative Effect by Mineral Dust Aerosols Constrained by New Microphysical and Spectral Optical Data 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (2)
作者:  Di Biagio, C.;  Balkanski, Y.;  Albani, S.;  Boucher, O.;  Formenti, P.
收藏  |  浏览/下载：4/0  |  提交时间：2020/07/02
mineral dust aerosols  direct radiative effect  coarse size particles  complex refractive index  longwave scattering  
Direct Radiative Effect of Absorbing Aerosols: Sensitivity to Mixing State, Brown Carbon, and Soil Dust Refractive Index and Shape 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (2)
作者:  Tuccella, Paolo;  Curci, Gabriele;  Pitari, Giovanni;  Lee, Seungun;  Jo, Duseong S.
收藏  |  浏览/下载：9/0  |  提交时间：2020/07/02