کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8365245 | 1542622 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Iso-FD: A novel method for measuring the isotopic signature of surface flux
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش خاک شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Iso-FD: A novel method for measuring the isotopic signature of surface flux Iso-FD: A novel method for measuring the isotopic signature of surface flux](/preview/png/8365245.png)
چکیده انگلیسی
Stable carbon isotopes have become a critical and often used tool in understanding ecological and physical processes affecting gas production and emissions in soil. While the insights gained using chamber based flux methods have been significant, it is known now that many of these chamber methods have an inherent bias that complicates the interpretation of their measurements. Here we present a new chamber method that uses diffusive membranes to control CO2 flow into and out of the chamber, and can measure the isotopic composition of soil flux without inducing a bias. We present numerical modeling, followed by laboratory calibration and field measurements using this new method coupled to a Cavity Ring Down Spectrometer (CRDS). Simulations, as well was lab and field results showed that the method is both robust over a range of environmental conditions and can be unbiased, unlike other chamber approaches. Finally, we discuss possibilities for future improvements and variations on the measurement approaches we used.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Biology and Biochemistry - Volume 62, July 2013, Pages 99-106
Journal: Soil Biology and Biochemistry - Volume 62, July 2013, Pages 99-106
نویسندگان
Nick Nickerson, Jocelyn Egan, Dave Risk,