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In situ evidence of thermally induced rock breakdown widespread on Bennu's surface 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Molaro, J. L.;  39;Aubigny, C. Drouet
收藏  |  浏览/下载:8/0  |  提交时间:2020/06/16
Earth and field observations underpin metapopulation dynamics in complex landscapes: Near-term study on carabids 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (23) : 12877-12884
作者:  Giezendanner, Jonathan;  Pasetto, Damiano;  Perez-Saez, Javier;  Cerrato, Cristiana;  Viterbi, Ramona;  Terzago, Silvia;  Palazzi, Elisa;  Rinaldo, Andrea
收藏  |  浏览/下载:6/0  |  提交时间:2020/06/01
species distribution models  metapopulation ecology  landscape matrix  Earth observation  carabids  
Remote sensing northern lake methane ebullition 期刊论文
NATURE CLIMATE CHANGE, 2020, 10 (6) : 511-+
作者:  Engram, M.;  Anthony, K. M. Walter;  Sachs, T.;  Kohnert, K.;  Serafimovich, A.;  Grosse, G.;  Meyer, F. J.
收藏  |  浏览/下载:8/0  |  提交时间:2020/05/13
Improving SWE Estimation With Data Assimilation: The Influence of Snow Depth Observation Timing and Uncertainty 期刊论文
WATER RESOURCES RESEARCH, 2020, 56 (5)
作者:  Smyth, Eric J.;  Raleigh, Mark S.;  Small, Eric E.
收藏  |  浏览/下载:9/0  |  提交时间:2020/05/13
SWE  Assimilation  Particle Filter  Snow Depth  Observation Timing  Snow Density  
A Model Analysis of the Tidal Engine That Drives Nitrogen Cycling in Coastal Riparian Aquifers 期刊论文
WATER RESOURCES RESEARCH, 2020, 56 (4)
作者:  Wallace, Corey D.;  Sawyer, Audrey H.;  Barnes, Rebecca T.;  Soltanian, Mohamad Reza;  Gabor, Rachel S.;  Wilkins, Michael J.;  Moore, Myles T.
收藏  |  浏览/下载:7/0  |  提交时间:2020/07/02
surface water-groundwater interactions  tidal  hyporheic  riparian  nitrogen  numerical modeling  
Reconstruction of GRACE Data on Changes in Total Water Storage Over the Global Land Surface and 60 Basins 期刊论文
WATER RESOURCES RESEARCH, 2020, 56 (4)
作者:  Sun, Zhangli;  Long, Di;  Yang, Wenting;  Li, Xueying;  Pan, Yun
收藏  |  浏览/下载:13/0  |  提交时间:2020/07/02
GRACE  spherical harmonics  mascons  machine learning  data gaps  reconstruction  
Comparison of Data-Driven Techniques to Reconstruct (1992-2002) and Predict (2017-2018) GRACE-Like Gridded Total Water Storage Changes Using Climate Inputs 期刊论文
WATER RESOURCES RESEARCH, 2020, 56 (5)
作者:  Li, Fupeng;  Kusche, Juergen;  Rietbroek, Roelof;  Wang, Zhengtao;  Forootan, Ehsan;  Schulze, Kerstin;  Lueck, Christina
收藏  |  浏览/下载:5/0  |  提交时间:2020/05/13
Geology of the InSight landing site on Mars 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Golombek, M.;  Warner, N. H.;  Grant, J. A.;  Hauber, E.;  Ansan, V;  Weitz, C. M.;  Williams, N.;  Charalambous, C.;  Wilson, S. A.;  DeMott, A.;  Kopp, M.;  Lethcoe-Wilson, H.;  Berger, L.;  Hausmann, R.;  Marteau, E.;  Vrettos, C.;  Trussell, A.;  Folkner, W.;  Le Maistre, S.;  Mueller, N.;  Grott, M.;  Spohn, T.;  Piqueux, S.;  Millour, E.;  Forget, F.;  Daubar, I;  Murdoch, N.;  Lognonne, P.;  Perrin, C.;  Rodriguez, S.;  Pike, W. T.;  Parker, T.;  Maki, J.;  Abarca, H.;  Deen, R.;  Hall, J.;  Andres, P.;  Ruoff, N.;  Calef, F.;  Smrekar, S.;  Baker, M. M.;  Banks, M.;  Spiga, A.;  Banfield, D.;  Garvin, J.;  Newman, C. E.;  Banerdt, W. B.
收藏  |  浏览/下载:7/0  |  提交时间:2020/05/13
Observations of grain-boundary phase transformations in an elemental metal 期刊论文
NATURE, 2020, 579 (7799) : 375-+
作者:  Valente, Luis;  Phillimore, Albert B.;  Melo, Martim;  Warren, Ben H.;  Clegg, Sonya M.;  Havenstein, Katja;  Tiedemann, Ralph;  Illera, Juan Carlos;  Thebaud, Christophe;  Aschenbach, Tina;  Etienne, Rampal S.
收藏  |  浏览/下载:16/0  |  提交时间:2020/07/03

Atomic-resolution observations combined with simulations show that grain boundaries within elemental copper undergo temperature-induced solid-state phase transformation to different structures  grain boundary phases can also coexist and are kinetically trapped structures.


The theory of grain boundary (the interface between crystallites, GB) structure has a long history(1) and the concept of GBs undergoing phase transformations was proposed 50 years ago(2,3). The underlying assumption was that multiple stable and metastable states exist for different GB orientations(4-6). The terminology '  complexion'  was recently proposed to distinguish between interfacial states that differ in any equilibrium thermodynamic property(7). Different types of complexion and transitions between complexions have been characterized, mostly in binary or multicomponent systems(8-19). Simulations have provided insight into the phase behaviour of interfaces and shown that GB transitions can occur in many material systems(20-24). However, the direct experimental observation and transformation kinetics of GBs in an elemental metal have remained elusive. Here we demonstrate atomic-scale GB phase coexistence and transformations at symmetric and asymmetric [111 over bar ] tilt GBs in elemental copper. Atomic-resolution imaging reveals the coexistence of two different structures at sigma 19b GBs (where sigma 19 is the density of coincident sites and b is a GB variant), in agreement with evolutionary GB structure search and clustering analysis(21,25,26). We also use finite-temperature molecular dynamics simulations to explore the coexistence and transformation kinetics of these GB phases. Our results demonstrate how GB phases can be kinetically trapped, enabling atomic-scale room-temperature observations. Our work paves the way for atomic-scale in situ studies of metallic GB phase transformations, which were previously detected only indirectly(9,15,27-29), through their influence on abnormal grain growth, non-Arrhenius-type diffusion or liquid metal embrittlement.


  
Satellite Gravimetry Improves Seasonal Streamflow Forecast Initialization in Africa 期刊论文
WATER RESOURCES RESEARCH, 2020, 56 (2)
作者:  Getirana, Augusto;  Jung, Hahn Chul;  Arsenault, Kristi;  Shukla, Shraddhanand;  Kumar, Sujay;  Peters-Lidard, Christa;  Maigari, Issoufou;  Mamane, Bako
收藏  |  浏览/下载:12/0  |  提交时间:2020/07/02
seasonal forecast  GRACE  data assimilation  terrestrial water storage  streawmflow  West Africa