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Ước tính khả năng trao đổi CO2 của hệ sinh thái rừng ngập mặn cần giờ bằng phương pháp Eddy Covariance

Bài viết giới thiệu kết quả nghiên cứu khả năng hấp thụ carbon của hệ sinh thái rừng ngập mặn Cần Giờ trên cơ sở tiếp cận phương pháp phương sai rối Eddy-Covariance qua hệ thống Tháp quan trắc dòng CO2. | TAP CHI SINH HOC 2019 41 2se1 amp 2se2 377 384 DOI 10.15625 0866-7160 v41n2se1 amp 2se2.14149 ESTIMATION OF NET ECOSYSTEM CO2 EXCHANGE IN CAN GIO MANGROVE ECOSYSTEMS USING EDDY COVARIANCE TECHNIQUE Do Phong Luu Vitaly K. Avilov Nguyen Van Thinh Joint Russian - Vietnamese Tropical Scientific Research and Technological Center Southern Branch Vietnam Received 10 August 2019 accepted 27 September 2019 ABSTRACT This article presents the results of the monitoring on carbon absorption of Can Gio mangrove ecosystem based on the approach of Eddy-Covariance technique through the system of CO 2 fluxes observation tower. During the two years period from May 2017 to April 2019 the results of processing and analysis of the database obtained from specialized monitoring instruments showed that CO 2 content was absorbed discharged between mangrove ecosystem and the atmosphere depended on the day and night time due to photosynthesis of vegetation. The strongest absorption time of CO 2 is from 11 00 am to 12 00 pm. From 06 00 pm to 08 00 am next morning a small amount of CO 2 is released into the atmosphere. The monthly average carbon absorption capacity was 108.835 gC m2 the lowest was 62.88 gC m2 12 2017 the highest was 167.16 gC m2 4 2018 . The total amount of carbon absorbed in the first 12 months was 1 321 gC m2 and 1 293 gC m2 for the next period equivalent to 48 tCO 2 ha . In summary Can Gio mangrove Biosphere Reserve is considered a significant carbon sink in the tropics. Keywords Net ecosystem exchange of CO2 eddy covariance mangrove forest Can Gio. Citation Do Phong Luu Avilov V. K. Nguyen Van Thinh 2019. Estimation of net ecosystem CO2 exchange in Can Gio mangrove ecosystems using Eddy Covariance technique. Tap chi Sinh hoc 41 2se1 amp 2se2 377 384. https doi.org 10.15625 0866-7160 v41n2se1 amp 2se2.14149. Corresponding author email dophongluu@gmail.com 2019 Vietnam Academy of Science and Technology VAST 377 TAP CHI SINH HOC 2019 41 2se1 amp 2se2 377 384 DOI 10.15625 .