Results 51 to 60 of about 11,527 (183)

A Drone‐Borne Method to Jointly Estimate Discharge and Manning's Roughness of Natural Streams

open access: yesWater Resources Research, 2020
Image cross‐correlation techniques, such as particle image velocimetry (PIV), can estimate water surface velocity (v surf) of streams. However, discharge estimation requires water depth and the depth‐averaged vertical velocity (U m ).
Filippo Bandini   +9 more
semanticscholar   +1 more source

Contrail Formation Within Cirrus: Contrail Induced Perturbations and Cirrus Adjustments

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 8, 28 April 2026.
Abstract Contrail formation constitutes a large fraction of the aviation climate impact. But only part of the effect has been studied in detail, as research focused on contrail formation in cloud‐free air. Even though it is known that the impact of contrail formation within cirrus can be detected in space‐born remote sensing data, little research has ...
Pooja Verma, Ulrike Burkhardt
wiley   +1 more source

Permafrost Terrain Disturbance Susceptibility in the Nacho Nyäk Tagé (Stewart River) Watershed, Yukon, Canada

open access: yesPermafrost and Periglacial Processes, Volume 37, Issue 2, Page 203-226, April/June 2026.
ABSTRACT The Nacho Nyäk Tagé (Stewart River) watershed in central Yukon (Canada) is characterized by discontinuous permafrost that is locally highly sensitive to thaw. This study aims to map the spatial distribution of permafrost terrain disturbances (PTDs) in the watershed and model thaw susceptibility to support community‐led land‐use planning by the
Frederic Brieger   +2 more
wiley   +1 more source

A Model Intercomparison Study to Investigate Mixing Characteristics in Non‐Precipitating Stratocumulus Clouds

open access: yesJournal of Advances in Modeling Earth Systems, Volume 18, Issue 4, April 2026.
Abstract Recent aircraft observations of marine stratocumulus clouds consistently showed that cloud microphysical relationships vary with altitude, indicating inhomogeneous mixing characteristics near cloud top and homogeneous mixing characteristics in mid‐levels of clouds.
Fan Yang   +13 more
wiley   +1 more source

Geoengineering: A war on climate change? [PDF]

open access: yes, 2016
Geoengineering; specifically Solar Radiation Management ; has been proposed to effect rapid influence over the Earth’s climate system in order to counteract Anthropogenic Global Warming.
Lockley, Andrew
core  

Drone-Borne P-band Single-Pass InSAR

open access: yesInternational Radar Conference, 2020
This paper presents a high-accuracy single-pass drone-borne Interferometric Synthetic Aperture Radar System in the P-band (P-InSAR) for forest inventory, where ground and canopy heights are accurately determined.
Laila F. Moreira   +12 more
semanticscholar   +1 more source

NASA Thesaurus Supplement: A three part cumulative supplement to the 1982 edition of the NASA Thesaurus (supplement 2) [PDF]

open access: yes
The three part cumulative NASA Thesaurus Supplement to the 1982 edition of the NASA Thesaurus includes: part 1, hierarchical listing; part 2, access vocabulary, and part 3, deletions. The semiannual supplement gives complete hierarchies for new terms and

core   +1 more source

Radar System Development for Drone Borne Applications with Focus on Snowpack Parameters

open access: yes, 2021
A complete representation of the Arctic cryosphere has historically been restricted by its remoteness, large extent, and restrictions in measurement methods and equipment. Here, remote sensing of snow-cover is a central method to improve the current knowledge of the Earth's ecosystem, and hence a critical component in cryospheric models.
openaire   +1 more source

An Inference about Interference: A Surprising Application of Existing International Law to Inhibit Anti-Satellite Weapons [PDF]

open access: yes, 2014
This article presents a thesis that most readers will find surprising, in an effort to develop a novel, simultaneous solution to three urgent, complex problems related to outer space.
Koplow, David A
core   +2 more sources

Aeronautical Engineering: A special bibliography with indexes, supplement 54 [PDF]

open access: yes
This bibliography lists 316 reports, articles, and other documents introduced into the NASA scientific and technical information system in January ...

core   +1 more source

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