scholarly journals New studies of the visible and near-infrared absorption by water vapour and some problems with the HITRAN database

2000 ◽  
Vol 27 (22) ◽  
pp. 3703-3706 ◽  
Author(s):  
Djedjiga Belmiloud ◽  
Roland Schermaul ◽  
Kevin M. Smith ◽  
Nikolai F. Zobov ◽  
James W. Brault ◽  
...  
Keyword(s):  
Water Vapour ◽  
Infrared Absorption ◽  
Near Infrared ◽  
Hitran Database

scholarly journals Radiative forcings for 28 potential Archean greenhouse gases

2014 ◽  
Vol 10 (5) ◽  
pp. 1779-1801 ◽  
Author(s):  
B. Byrne ◽  
C. Goldblatt
Keyword(s):  
Greenhouse Gases ◽  
Infrared Absorption ◽  
Radiative Forcing ◽  
Near Infrared ◽  
High Accuracy ◽  
The Other ◽  
Hitran Database ◽  
Warm Climate ◽  
Radiative Forcings ◽  
Standard Set

Abstract. Despite reduced insolation in the late Archean, evidence suggests a~warm climate which was likely sustained by a stronger greenhouse effect, the so-called faint young sun problem (FYSP). CO2 and CH4 are generally thought to be the mainstays of this enhanced greenhouse, though many other gases have been proposed. We present high accuracy radiative forcings for CO2, CH4, and 26 other gases, performing the radiative transfer calculations at line-by-line resolution and using HITRAN 2012 line data for background pressures of 0.5, 1, and 2 bar of atmospheric N2. For CO2 to resolve the FYSP alone at 2.8 Gyr BP (80% of present solar luminosity), 0.32 bar is needed with 0.5 bar of atmospheric N2, 0.20 bar with 1 bar of atmospheric N2, or 0.11 bar with 2 bar of atmospheric N2. For CH4, we find that near-infrared absorption is much stronger than previously thought, arising from updates to the HITRAN database. CH4 radiative forcing peaks at 10.3, 9, or 8.3 W m−2 for background pressures of 0.5, 1, or 2 bar, likely limiting the utility of CH4 for warming the Archean. For the other 26 HITRAN gases, radiative forcings of up to a few to 10 W m−2 are obtained from concentrations of 0.1–1 ppmv for many gases. For the 20 strongest gases, we calculate the reduction in radiative forcing due to overlap. We also tabulate the modern sources, sinks, concentrations, and lifetimes of these gases and summaries the literature on Archean sources and concentrations. We recommend the forcings provided here be used both as a first reference for which gases are likely good greenhouse gases, and as a standard set of calculations for validation of radiative forcing calculations for the Archean.

Study on the Near-infrared Absorption Properties of ZnGeP2 Single Crystals

2010 ◽  
Vol 25 (10) ◽  
pp. 1029-1033
Author(s):  
Shi-Xing XIA ◽  
Chun-Hui YANG ◽  
Chong-Qiang ZHU ◽  
Tian-Hui MA ◽  
Meng WANG ◽  
...  
Keyword(s):  
Single Crystals ◽  
Infrared Absorption ◽  
Near Infrared ◽  
Absorption Properties

Pyrrole-bridged quinones: π-electronic systems that modulate electronic structures by tautomerism and deprotonation

2021 ◽  
Author(s):  
Shinya Sugiura ◽  
Hiromitsu Maeda
Keyword(s):  
Infrared Absorption ◽  
Electronic Structures ◽  
Near Infrared ◽  
Ion Pairing ◽  
Anion Binding ◽  
Electronic Systems

A new series of π-extended quinone derivatives containing a pyrrole bridge exhibited NH/OH-type tautomerization and anion binding along with deprotonation that induced near-infrared absorption and ion-pairing assemblies.

scholarly journals Characterization and mapping of hematite ore mineral classes using hyperspectral remote sensing technique: a case study from Bailadila iron ore mining region

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Ibrahim Shaik ◽  
S. K. Begum ◽  
P. V. Nagamani ◽  
Narayan Kayet
Keyword(s):  
Infrared Absorption ◽  
Near Infrared ◽  
Spectral Feature ◽  
Absorption Feature ◽  
X Ray ◽  
Remote Sensing Technique ◽  
Ore Minerals ◽  
Feature Fitting ◽  
Hematite Ore

AbstractThe study demonstrates a methodology for mapping various hematite ore classes based on their reflectance and absorption spectra, using Hyperion satellite imagery. Substantial validation is carried out, using the spectral feature fitting technique, with the field spectra measured over the Bailadila hill range in Chhattisgarh State in India. The results of the study showed a good correlation between the concentration of iron oxide with the depth of the near-infrared absorption feature (R2 = 0.843) and the width of the near-infrared absorption feature (R2 = 0.812) through different empirical models, with a root-mean-square error (RMSE) between < 0.317 and < 0.409. The overall accuracy of the study is 88.2% with a Kappa coefficient value of 0.81. Geochemical analysis and X-ray fluorescence (XRF) of field ore samples are performed to ensure different classes of hematite ore minerals. Results showed a high content of Fe > 60 wt% in most of the hematite ore samples, except banded hematite quartzite (BHQ) (< 47 wt%).

The Diradical‐Dication Strategy for BODIPY‐ and Porphyrin‐Based Dyes with Near‐Infrared Absorption Maxima from 1070 to 2040 nm

2018 ◽  
Vol 24 (72) ◽  
pp. 19341-19347 ◽  
Author(s):  
Houjia Wei ◽  
Rui Feng ◽  
Yong Fang ◽  
Lei Wang ◽  
Chao Chen ◽  
...  
Keyword(s):  
Infrared Absorption ◽  
Near Infrared

An A–D–A′–D–A type small molecule acceptor with wide absorption spectrum and near-infrared absorption

2018 ◽  
Vol 2 (12) ◽  
pp. 2333-2339 ◽  
Author(s):  
Junhui Miao ◽  
Junxia Wang ◽  
Bin Meng ◽  
Jun Liu ◽  
Lixiang Wang
Keyword(s):  
Absorption Spectrum ◽  
Small Molecule ◽  
Infrared Absorption ◽  
Near Infrared

We report a new A–D–A′–D–A type small molecule acceptor with a wide absorption spectrum spanning from 300 nm to 900 nm and a bandgap of only 1.39 eV.

An extending broadband near-infrared absorption of Si-based deep-trench microstructures

2017 ◽  
Vol 392 ◽  
pp. 59-63 ◽  
Author(s):  
Haigui Yang ◽  
Xiaoyi Liu ◽  
Jinsong Gao ◽  
Xiaoyi Wang ◽  
Hai Liu ◽  
...  
Keyword(s):  
Infrared Absorption ◽  
Near Infrared ◽  
Deep Trench

Near Infrared Absorption Spectrophotometry

1952 ◽  
Vol 6 (5) ◽  
pp. 29-40 ◽  
Author(s):  
James L. Lauer ◽  
E. J. Rosenbaum
Keyword(s):  
Infrared Absorption ◽  
Near Infrared ◽  
Absorption Spectrophotometry
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