Results 91 to 100 of about 99,075 (290)

Global perspectives on nitrate aerosol dynamics: a comprehensive sensitivity analysis [PDF]

Atmospheric Chemistry and Physics
In recent years, nitrate aerosols have become a dominant component of atmospheric composition, surpassing sulfate in both concentration and climatic impact. However, accurately simulating nitrate remains a major challenge for global models due to complex
A. Milousis, S. M. C. Scholz, H. Fuchs, H. Fuchs, A. P. Tsimpidi, V. A. Karydis   +5 more
doaj   +1 more source

Photochemistry in the arctic free troposphere: NOx budget and the role of odd nitrogen reservoir recycling [PDF]

, 2003
The budget of nitrogen oxides (NOx) in the arctic free troposphere is calculated with a constrained photochemical box model using aircraft observations from the Tropospheric O3 Production about the Spring Equinox (TOPSE) campaign between February and May.
Atlas, E, Blake, D, Coffey, M, Flocke, F, Fried, A, Heikes, B, Lefer, B, Madronich, S, Ridley, B, Shetter, R, Stroud, C, Talbot, B, Weinheimer, A, Wert, B   +13 more
core   +1 more source

All‐sky assimilation impacts of the Tomorrow.io microwave sounder constellation on global weather forecasts

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Key Findings: An assimilation methodology is established for the Tomorrow.io microwave sounder (TMS) flying on CubeSats in sun‐synchronous and inclined orbits, and in all cloud scenes. The TMS has a significant impact on weather forecast lead times up to 3 days in the Tropics in a research‐quality numerical weather prediction setting, and yields water ...
Jonathan J. Guerrette, Ryan Honeyager, Stephen Joseph Munchak, Xiaoxu Tian   +3 more
wiley   +1 more source

Forecast verification using information and noise

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Verification of weather forecasts is usually expressed in terms of total error metrics. This is useful for end users of the forecasts but does not allow evaluation of the intrinsic information content of the forecasts. To overcome this limitation, we propose a new total error decomposition into information and noise error measures, connect it to ...
Massimo Bonavita, Alan J. Geer
wiley   +1 more source

Be-10/Be-7 tracer of atmospheric transport and stratosphere-troposphere exchange [PDF]

, 2003
The 10Be/7Be ratio is a sensitive tracer of atmospheric transport and stratosphere-troposphere exchange (STE). Data from five NASA aircraft field missions (PEM: West A and B, Tropics A; SONEX; and SUCCESS) have been assembled to produce the largest data ...
Dibb, Jack E., Finkel, R C, Jordan, C.
core   +1 more source

Stratosphere-troposphere transport in a numerical simulation of midlatitude convection [PDF]

, 2007
The transport of stratospheric air deep into the troposphere via convection is investigated numerically using the UK Met Office Unified Model. A convective system that formed on 27 June 2004 near southeast England, in the vicinity an upper level ...
Bryan, Davies, Edwards, Gray, Gray, Gregory, Griffiths, Holton, Jeffrey M. Chagnon, Koch, Lamarque, Lane, Lane, Lock, Maddox, Moustaoui, Mullendore, Randriambelo, Reid, Roberts, Sprenger, Stohl, Stohl, Suzanne L. Gray, Wirth   +24 more
core   +1 more source

Moisture inversions in the central Arctic: Product assessment and long‐wave radiative effect

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study evaluates the integrated water vapour and the vertical distribution of water vapour of state‐of‐the‐art reanalyses, weather forecast models, and ground‐ and space‐based remote‐sensing products in the central Arctic. A particular focus lies on the representation of humidity inversions and the quantification of the long‐wave radiative effect ...
Andreas Walbröl, Susanne Crewell, Carola Barrientos‐Velasco, Giovanni Chellini, Hannes J. Griesche, Janna E. Rückert, Kerstin Ebell   +6 more
wiley   +1 more source

Kinetics of the reactions of OH with CO, NO, and NO₂ and of HO₂ with NO₂ in air at 1 atm pressure, room temperature, and tropospheric water vapour concentrations [PDF]

Atmospheric Chemistry and Physics
The termolecular reactions of hydroxyl radicals (OH) with carbon monoxide (CO), nitric oxide (NO), and nitrogen dioxides (NO2) and the termolecular reaction of hydroperoxy radicals (HO2) with NO2 greatly impact the atmospheric oxidation efficiency.
M. Rolletter, A. Hofzumahaus, A. Novelli, A. Wahner, H. Fuchs, H. Fuchs   +5 more
doaj   +1 more source

Operational all‐sky assimilation of geostationary infrared water‐vapour channels in the regional ICON‐D2 model with an ensemble Kalman filter

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Though many studies have shown potential benefit in assimilating all‐sky infrared radiances from geostationary satellites, at numerical weather prediction centres it is still common practice to assimilate clear‐sky radiances. We present the operationalization of the all‐sky assimilation of the spinning enhanced visible and infrared imager (SEVIRI ...
Annika Schomburg, Christoph Schraff, Christina Köpken‐Watts, Klaus Stephan, Liselotte Schühl, Robin Faulwetter   +5 more
wiley   +1 more source

Summertime partitioning and budget of NOycompounds in the troposphere over Alaska and Canada: ABLE 3B [PDF]

, 1994
As part of NASA's Arctic Boundary Layer Expedition 3A and 3B field measurement programs, measurements of NO(x) HNO31, PAN, PPN, and NOy were made in the middle to lower troposphere over Alaska and Canada during the summers of 1988 and 1990.
Anderson, B, Barrick, J, Blake, D, Bradshaw, J, Collins, J, Gorzelska, K, Gregory, G, Herlth, D, Klemm, K, Klemm, O, Lefer, B, O'Hara, D, Olson, J, Sachse, G, Sandholm, S, Singh, H, Talbot, R   +16 more
core   +1 more source