Results 121 to 130 of about 18,965 (247)
Invigoration Due To Cloud Seeding: New Observations Confirm an Old Hypothesis
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract The potential for cloud seeding to induce dynamic changes that alter cloud structure beyond basic ice formation processes has remained theoretical. While previous research hypothesized the presence of dynamic responses in seeded clouds, this study presents the first direct observational evidence that seeding can generate buoyant forces strong ...
Christopher C. Hohman +11 more
wiley +1 more source
De-icing of the altitude wind tunnel turning vanes by electro-magnetic impulse [PDF]
The Altitude Wind Tunnel at the NASA-Lewis facility is being proposed for a refurbishment and moderization. Two major changes are: (1) the increasing of the test section Mach number to 0.90, and (2) the addition of spray nozzles to provide simulation of ...
Ross, R., Zumwalt, G. W.
core +1 more source
Simulation of Water Vapor Transport to the Stratosphere by Overshooting Convection
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 6, 28 March 2026.Abstract Deep convection that penetrates the tropopause (overshooting convection) transports water vapor and other tropospheric constituents to the upper troposphere and lower stratosphere (UTLS). Overshooting convection has chemical and radiative impacts on the UTLS, including the downward transport of ozone and hydration of the stratosphere ...
Daniel R. Jellis +3 more
wiley +1 more source
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 6, 28 March 2026.Abstract In this study, we investigate the characteristics of stratosphere‐troposphere exchange (STE) of ozone and carbon monoxide (CO) over the North Pacific on the 350 K isentropic surface during 2005–2021 using two chemical reanalyses (Copernicus Atmosphere Monitoring Service and TCR‐2).
Haosen Xi, Masatomo Fujiwara
wiley +1 more source
Xibei Gongye Daxue XuebaoIcing seriously affects the aerodynamic coefficients and flight performance of an aircraft. To address this problem, in this paper a fixed-time incremental nonlinear dynamic inversion(INDI) control method based on a fixed-time dilated state observer ...
JIANG Feihong +4 more
doaj +1 more source
NASA's Aircraft Icing Analysis Program [PDF]
An overview of the NASA ongoing efforts to develop an aircraft icing analysis capability is presented. Discussions are included of the overall and long term objectives of the program as well as current capabilities and limitations of the various computer
Shaw, R. J.
core +1 more source
Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.Abstract Uncertainty in anthropogenic forcing driven by aerosol‐cloud interactions (aci) limits our ability to infer the sensitivity of the Earth system to forcing from historical records. The driver of aci is the change in cloud droplet number concentration (Nd) due to changes in aerosol serving as cloud condensation nuclei (CCN).
Dani B. Jones +9 more
wiley +1 more source
NASA aircraft-icing research has been applied to expand the utility of the big flying-crane helicopter built by the Sikorsky Aircraft Division of United Technologies in Stratford, Conn.
core +1 more source
Icing testing in the large Modane wind-tunnel on full-scale and reduced scale models [PDF]
Icing tests on full scale models of parts of aircraft (wings, tailplanes, radome) equipped with actual de-icing systems were carried out in the large Modane wind tunnel of ONERA.
Charpin, F., Fasso, G.
core +1 more source