Results 51 to 60 of about 14,602 (246)

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

open access: yesEPJ 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   +6 more
doaj   +1 more source

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

open access: yesEPJ 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   +5 more
doaj   +1 more source

ON-LINE WAVELENGTH CALIBRATION OF PULSED LASER FOR CO2 DIFFERENTIAL ABSORPTION LIDAR [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Differential absorption lidar (DIAL) remote sensing is a promising technology for atmospheric CO2 detection. However, stringent wavelength accuracy and stability are required in DIAL system.
C. Xiang   +8 more
doaj   +1 more source

Intercomparison of CL31 and CL51 ceilometers and impact of installation angle on cloud base height measurement agreement

open access: yesWeather, EarlyView.
Lowest‐layer cloud base height (CBH) measurements obtained between July 2018 and December 2019 from four ceilometers at the Korea Standard Meteorological Observatory were compared to determine how ceilometer installation angle differentially affects CBH measurements.
Jaewon Kim   +3 more
wiley   +1 more source

Research on Synchronous Inversion Algorithm Based on Tri-Wavelength DIAL

open access: yesOptics
Traditionally, retrieving both temperature and CO2 concentration in atmospheric remote sensing has relied on two independent lidar systems, leading to increased system complexity and limited coordination.
Zhixiao Xu   +4 more
doaj   +1 more source

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

open access: yesEPJ 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   +2 more
doaj   +1 more source

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

open access: yesAtmosphere, 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   +5 more
doaj   +1 more source

A mobile system for active otpical pollution monitoring [PDF]

open access: yes, 1986
The remote monitoring of atmospheric pollutants can now be performed in several ways. Laser radar techniques have proven their ability to reveal the spatial distribution of different species or particles.
Edner, H.   +5 more
core   +1 more source

Internal physiological drivers of leaf development in trees: Understanding the relationship between non‐structural carbohydrates and leaf phenology

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant phenology is crucial for understanding plant growth and climate feedback. It affects canopy structure, surface albedo, and carbon and water fluxes. While the influence of environmental factors on phenology is well‐documented, the role of plant intrinsic factors ...
Yunpeng Luo   +8 more
wiley   +1 more source

Cold comfort for change: Stream mats as biological indicators of ecosystem processes in the McMurdo Dry Valleys, Antarctica

open access: yesJournal of Phycology, EarlyView.
Abstract Glacier‐fed streams (GFSs) make ideal systems for studying climate‐related changes. Some of the best‐studied GFSs are found in the McMurdo Dry Valleys (MDVs) of Antarctica, one of the Earth's coldest and driest deserts. Despite their harsh and isolated nature, MDV GFSs represent an oasis of life in a landscape visually devoid of it, with ...
Tyler J. Kohler   +5 more
wiley   +1 more source

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