کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4460074 | 1621304 | 2010 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparison of four global FAPAR datasets over Northern Eurasia for the year 2000
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
کامپیوتر در علوم زمین
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Comparison of four global FAPAR datasets over Northern Eurasia for the year 2000 Comparison of four global FAPAR datasets over Northern Eurasia for the year 2000](/preview/png/4460074.png)
چکیده انگلیسی
The Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) has been identified as one of several key satellite-derived biophysical datasets. With multiple global FAPAR datasets now available and a lack of in-situ measurements and comparison studies in the far north, this study attempts to provide the reader with an indication of the performance of four global FAPAR datasets (MODIS, CYCLOPES, JRC and GLOBCARBON) over Northern Eurasia in the year 2000 via comparison. Within the year 2000 growing season, both the MODIS and CYCLOPES datasets recorded on average similar but substantially higher values than the JRC and GLOBCARBON datasets. Among three of the four datasets, a high level of agreement in deciduous broadleaf forests and croplands was observed. Largest disagreement occurred among needleleaf forests and grassland/shrubland. Potential reasons for discrepancies among the datasets include different retrieval methods, use of LAI and land cover, snow effects and others. Findings from this study and other published results suggest that overall, JRC best captures FAPAR over northern Eurasia in the year 2000. However, when considering individual landcover types, any one or more of the four products may be suitable. There exists a real need for more in-situ measurements in this region - the lack of such measurements makes evaluation extremely difficult. It appears that areas north of 60° urgently require further investigation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Remote Sensing of Environment - Volume 114, Issue 5, 17 May 2010, Pages 941-949
Journal: Remote Sensing of Environment - Volume 114, Issue 5, 17 May 2010, Pages 941-949
نویسندگان
Ian McCallum, Wolfgang Wagner, Christiane Schmullius, Anatoly Shvidenko, Michael Obersteiner, Steffen Fritz, Sten Nilsson,