Results 81 to 90 of about 2,423,184 (252)

Clear air turbulence detection and characterisation in the delicat airborne lidar project [PDF]

, 2010
We report on a development of a long-range airborne UV high spectral resolution lidar, intended for the detection and characterisation of clear air turbulence (CAT).
Hervé Barny, Martin Wirth, Lombard, Laurent, Rees, David, Barny, Hervé, Gaudo, Thierry, Rempel, Dimitry, D. Rees, Gerhard Ehret, Rondeau, Philippe, Dolfi-Bouteyre, Agnès, Patrick Vrancken, Vrancken, Patrick, Laurent Lombard, David Rees, Agnes Dolfi-bouteyre, Thierry Gaudo, Dimitry Rempel, Ehret, Gerhard, Wirth, Martin   +19 more
core  

Upper-mesospheric temperatures measured during intense substorms in the declining phase of the January 2005 solar proton events [PDF]

, 2008
Temperature measurements from the ALOMAR Weber Na lidar together with cosmic radio noise absorption measurements from IRIS and particle measurements from NOAA 15, 16 and 17 are used to study effects of geomagnetic activity on the polar winter upper ...
J. Stadsnes, H. Nesse Tyssøy, Honary, F., D. Heinrich, Nesse Tyssøy, H.N., Williams, B.P., Heinrich, D., B. P. Williams, D. S. Evans, F. Honary, Stadsnes, J., Hoppe, U.P., U.-P. Hoppe, Sorbo, M., Evans, D.S., M. Sørbø   +15 more
core   +2 more sources

Integrating SfM, LiDAR and TLS for High‐Resolution Monitoring of Palsa Surface Changes and Degradation Dynamics

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Understanding fine‐scale surface changes is crucial for quantifying ecosystem dynamics and detecting landscape changes. Palsas, comparably small peatland elevations with an ice‐rich permafrost core, undergo natural cycles of growth and degradation. They can also serve as indicators of climate change in subarctic regions. Because they typically
Alexander Störmer, Timo Kumpula, Pasi Korpelainen, Benjamin Burkhard   +3 more
wiley   +1 more source

Remote sensing of methane emissions by combining optical similitude absorption spectroscopy (OSAS) and lidar

EPJ Web of Conferences, 2018
Monitoring the emission of gases is difficult to achieve in industrial sites and in environments presenting poor infrastructures. Hence, robust methodologies should be developed and coupled to Lidar technology to allow remote sensing of gas emission ...
Galtier Sandrine, Anselmo Christophe, Welschinger Jean-Yves, Cariou Jean-Pierre, Sivignon Jean-François, Miffre Alain, Rairoux Patrick   +6 more
doaj   +1 more source

Scheimpflug-like processing of differential absorption lidar data on water vapor [PDF]

EPJ Web of Conferences
Differential Absorption Lidar (DiAL) method is widely used for a number of ground-based and airborne greenhouse gas measurement applications. However, for a direct detection in the 2µm range, other sources of random noise can be neglected in front of the
Esnouf Tancrède, Dherbecourt Jean-Baptiste, Raybaut Myriam, Hamperl Jonas, Melkonian Jean-Michel, Flamant Cyrille   +5 more
doaj   +1 more source

Latent Heat Fluxes over Complex Terrain from Airborne Water Vapour and Wind Lidars [PDF]

, 2009
Tropospheric profiles of water vapour and wind were measured with a differential absorption lidar (DIAL) and a heterodyne detection Doppler wind lidar collo-cated onboard the DLR Falcon research aircraft in the past two years.
Kiemle, Christoph, Fix, Andreas, Rahm, Stephan, Wirth, Martin   +3 more
core  

Scaling turbulence drives the general circulation

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The NOAA Gulfstream SP4, which deployed the GPS dropsondes over the NE Pacific Ocean as part of the Winter Storms Project during the January–March periods of 2004, 2005 and 2006. Abstract Statistical multifractal analysis of airborne and dropsonde observations is used to show that persistence of velocity after molecular collisions breaks the continuous
Adrian F. Tuck
wiley   +1 more source

Development of wavelength locking circuit for 1.53 micron water vapor monitoring coherent differential absorption LIDAR

EPJ Web of Conferences, 2018
We have studied a ground based coherent differential absorption LIDAR (DIAL) for vertical profiling of water vapor density using a 1.5μm laser wavelength. A coherent LIDAR has an advantage in daytime measurement compared with incoherent LIDAR because the
Imaki Masaharu, Kojima Ryota, Kameyama Shumpei   +2 more
doaj   +1 more source

Feasibility Study of Multi-Wavelength Differential Absorption LIDAR for CO2 Monitoring

Atmosphere, 2016
To obtain a better understanding of carbon cycle and accurate climate prediction models, highly accurate and temporal resolution observation of atmospheric CO2 is necessary. Differential absorption LIDAR (DIAL) remote sensing is a promising technology to
Chengzhi Xiang, Xin Ma, Ailin Liang, Ge Han, Wei Gong, Fa Yan   +5 more
doaj   +1 more source

Model-based inference for biomass estimation in a LiDAR sample survey in Hedmark County, Norway [PDF]

, 2011
In forest inventories, regression models are often applied to predict quantities such as biomass at the level of sampling units. In this paper, we propose a model-based inference framework for combining sampling and model errors in the variance ...
Erik Næsset, Ross Nelson, Holm, Sören, Göran Ståhl, Sören Holm, Timothy G. Gregoire, Ståhl, Göran, Gregoire, Timothy G., Gobakken, Terje, Terje Gobakken, Næsset, Erik, Nelson, Ross, Sveriges lantbruksuniversitet., Holm, Sören,, Ståhl, Göran,   +14 more
core   +1 more source