Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Jon M. Welles"'
Autor:
Jon M. Welles, Aaron J. Saathoff
Publikováno v:
Plant, Cell & Environment. 44:3509-3523
Leaf level gas exchange is a widely used technique that provides real-time measurement of leaf physiological properties, including CO2 assimilation (A), stomatal conductance to water vapour (gsw ) and intercellular CO2 (Ci ). Modern open-path gas exc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8218a2387e88cea7bcf1531b3a0ce0fa
https://doi.org/10.1111/pce.14178
https://doi.org/10.1111/pce.14178
Publikováno v:
Agricultural and Forest Meteorology. :170-183
Correct estimates of gap fraction are essential for quantifying canopy architectural variables, such as leaf area and clumping indices, which modify land–atmosphere interactions. However, gap fraction measurements from optical sensors are contamina
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::144e973c019d6439fd87ab24c7d7114b
https://doi.org/10.1016/j.agrformet.2013.02.013
https://doi.org/10.1016/j.agrformet.2013.02.013
Autor:
Robert D. Eckles, Bernard Genty, B. Riensche, Thomas J. Avenson, S. D. Loriaux, Dayle K. McDermitt, Jon M. Welles
Publikováno v:
Plant, Cell & Environment. 36:1755-1770
Estimation of the maximum chlorophyll fluorescence yield under illumination, or Fm′, by traditional single saturation pulse (SP) methodology is prone to underestimation error because of rapid turnover within photosystem (PS) II. However, measuremen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aeeb2981b1d75c164ef4c4d91bbd972f
https://doi.org/10.1111/pce.12115
https://doi.org/10.1111/pce.12115
Autor:
Martha C. Anderson, Jon M. Welles
Publikováno v:
Agricultural and Forest Meteorology. 149:2064-2070
If you have ever used a quantum sensor, or measured the LAI of a plant canopy, or lugged around a portable photosynthesis system, then you are likely the beneficiary of just some of John Norman's work in instrumentation. In his nearly 40-year career
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5a551d9b55e0d9ad5db6c823232d304
https://doi.org/10.1016/j.agrformet.2009.05.013
https://doi.org/10.1016/j.agrformet.2009.05.013
Autor:
Jon M. Welles, Dayle K. Mcdermitt
Publikováno v:
Micrometeorology in Agricultural Systems
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4499e3e68ecbf40fa8bc747cb72ff1c0
https://doi.org/10.2134/agronmonogr47.c13
https://doi.org/10.2134/agronmonogr47.c13
Autor:
Jon M. Welles, Shabtai Cohen
Publikováno v:
Journal of Experimental Botany. 47:1335-1342
In the past few years, a number of systems for making indirect canopy structural estimates have become commercially available. These include linear sensors, such as the DEMON, line quantum sensors, and hemispherical sensors, such as the LAI-2000, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba236e944d135ecd89b5bedf8e32857e
https://doi.org/10.1093/jxb/47.9.1335
https://doi.org/10.1093/jxb/47.9.1335
Autor:
Jon M. Welles
Publikováno v:
Remote Sensing Reviews. 5:31-43
(1990). Some indirect methods of estimating canopy structure. Remote Sensing Reviews: Vol. 5, Instrumentation for studying vegetation canopies for remote sensing in optical and thermal infrared regions, pp. 31-43.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b9b43b456c2208c672be1fa6ed4211e
https://doi.org/10.1080/02757259009532120
https://doi.org/10.1080/02757259009532120
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. :659-667
The apparent brightness of a natural surface depends on the characteristics and direction of incident radiation, surface radiative properties, and the direction from which the surface is viewed. The bidirectional reflectance distribution functions (B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48edf769312f5f8a6bc0f1695c746c06
https://doi.org/10.1109/tgrs.1985.289384
https://doi.org/10.1109/tgrs.1985.289384