Results 11 to 20 of about 20,858 (241)

On symmetric instabilities in oceanic bottom boundary layers [PDF]

Model studies of two-dimensional, time-dependent, wind-forced, stratified downwelling circulation on the continental shelf have shown that the near-bottom offshore flow can develop time- and space-dependent fluctuations involving spatially periodic ...
Allen, J. S., Newberger, P. A.
core   +6 more sources

Low Latency Global Carbon Budget Reveals Late 2024 Carbon Losses and Contrasting Early 2025 Land Sink Recovery Signals. [PDF]

Adv Sci (Weinh)
Low latency carbon budget estimates for July 2024–June 2025 combine atmospheric CO2 growth rates, fossil emissions, ocean uptake, DGVM land fluxes, and OCO‐2 inversions. The budget shows that late‐2024 land carbon losses dominate the annual anomaly, while early‐2025 recovery differs between bottom‐up models and top‐down inversions, especially in ...
Ke P, Ciais P, Yao Y, Sitch S, Li W, Du X, Gui X, Poulter B, Colligan T, van der Woude AM, Hooghiem J, Peters W, Liu Z, Deng Z, Jin Z, Tian X, Wang Y, Liu J, Pandey S, O'Dell C, Bian J, Miller J, Lan X, Goncalves De Souza J, O'Sullivan M, Friedlingstein P, Alléon J, Xi Y, Goll DS, Zhu L, van der Werf GR, Piao S, Chevallier F.   +32 more
europepmc   +2 more sources

A Comparative Study of Coherent & Incoherent Doppler Lidar Techniques

, 1994
Our purpose in this report is two-fold: 1) describe the basics of the coherent and incoherent systems, particularly the latter, and 2) compare the performance of the two technologies in a meaningful way. We conclude that an incoherent system, if properly
Skinner, Wilbert R., Hays, Paul B.
core   +7 more sources

Neural network for aerosol retrieval from hyperspectral imagery [PDF]

Atmospheric Measurement Techniques, 2019
We retrieve aerosol optical thickness (AOT) independently for brown carbon, dust and sulfate from hyperspectral image data. The model, a neural network, is trained on atmospheric radiative transfer calculations from MODTRAN 6.0 with varying aerosol ...
S. Mauceri, S. Mauceri, B. Kindel, S. Massie, P. Pilewskie, P. Pilewskie   +5 more
doaj   +1 more source

Storm time dynamics of auroral electrojets: CHAMP observation and the Space Weather Modeling Framework comparison [PDF]

Annales Geophysicae, 2008
We investigate variations of the location and intensity of auroral currents during two magnetic storm periods based on magnetic field measurements from CHAMP separately for both hemispheres, as well as for the dayside and nightside.
H. Wang, H. Wang, H. Lühr, A. Ridley, P. Ritter, Y. Yu   +5 more
doaj   +1 more source

The use of GPS buoys in the determination of oceanic variables [PDF]

, 2000
GPS observables taken from light-weight GPS buoys more than 80 km from the GPS reference stations have been analysed using different noise models in the parameter estimation process.
Rius, Antonio, Behrend, Dirk, Ruffini, Giulio, Cardellach, Estel   +3 more
core   +1 more source

Dehydration effects from contrails in a coupled contrail–climate model [PDF]

Atmospheric Chemistry and Physics, 2015
The uptake of water by contrails in ice-supersaturated air and the release of water after ice particle advection and sedimentation dehydrates the atmosphere at flight levels and redistributes humidity mainly to lower levels.
U. Schumann, J. E. Penner, Yibin Chen, Cheng Zhou, K. Graf   +4 more
doaj   +1 more source

Distribution and Evolution of Chorus Waves Modeled by a Neural Network: The Importance of Imbalanced Regression

Space Weather, 2023
Whistler‐mode chorus waves play an essential role in the acceleration and loss of energetic electrons in the Earth’s inner magnetosphere, with the more intense waves producing the most dramatic effects. However, it is challenging to predict the amplitude
Xiangning Chu, Jacob Bortnik, Wen Li, Xiao‐Chen Shen, Qianli Ma, Donglai Ma, David Malaspina, Sheng Huang   +7 more
doaj   +1 more source

Far‐UV emissions from the SL9 impacts with Jupiter [PDF]

, 1995
Observations with the International Ultraviolet Explorer (IUE) during the impacts of the fragments of comet D/Shoemaker-Levy 9 with Jupiter show far-UV emissions from the impact sites within a similar to 10 min time scale.
Liu, X, Rego, D, Fireman, G, Ajello, JM, Combi, M. R., Harris, W. M., Feldman, P. D., ben Jaffel, L., Liu, X., Strobel, DF, Jessup, K. L., Feldman, PD, Talavera, A., Livengood, T. A., Gladstone, GR, Budzien, SA, McGrath, MA, Clarke, J. T., ben Jaffel, L, Talavera, A, Prangé, R., Strobel, D. F., Ajello, J. M., Fireman, G., Vincent, M. B., Vincent, MB, Jessup, KL, Emerich, C., Miller, S., Hall, D. T., Combi, MR, Gladstone, G. R., McGrath, M. A., Woodney, L, Emerich, C, Rego, D., Budzien, S. A., Harris, WM, Miller, S, Clarke, JT, Ballester, GE, Livengood, TA, Ballester, G. E., Prangé, R, Woodney, L., Hall, DT   +45 more
core   +1 more source

Empirically Estimated Electron Lifetimes in the Earth's Radiation Belts: Comparison With Theory

Geophysical Research Letters, 2020
We compute quasilinear diffusion rates due to pitch angle scattering by various mechanisms in the Earth's electron radiation belts. The calculated theoretical lifetimes are compared with observed decay rates, and we find excellent qualitative agreement ...
S. G. Claudepierre, Q. Ma, J. Bortnik, T. P. O'Brien, J. F. Fennell, J. B. Blake   +5 more
doaj   +1 more source