Characteristics of CO2 Concentration and Flux in the Beijing Urban Area
| Publication Date: |
2018-01-27
|
|---|---|
| Publisher: |
Wiley-Blackwell
|
| Print ISSN: |
0148-0227
|
| Topics: |
Geosciences
Physics
|
| Published by: |
| _version_ | 1836398765684031488 |
|---|---|
| autor | X. L. Cheng, X. M. Liu, Y. J. Liu, F. Hu |
| beschreibung | Since February 2012, CO 2 , H 2 O, and wind data at 10 Hz have been measured by the open-path eddy covariance systems at 8, 16, 47, 80, 140, 200, and 280 m above ground level on the 325-m Beijing meteorological tower. Analysis of the data from 2013 to 2016 indicates that the annual averaged CO 2 concentration increased and the local and regional CO 2 emission decreased with the sequestration of background CO 2 concentration. The maximum values occurred during winter and the minimum values occurred during summer. During spring, summer, and autumn, there was a constant CO 2 flux layer from 47 m to 140 m. However, during winter, CO 2 flux increased with height, and the maximum appeared at approximately 140 m and then decreased with height. Above 47 m, the CO 2 fluxes were represented as the net efflux; and below 16 m, the fluxes were near zero or a net uptake. At all observed heights, the diurnal variation in the CO 2 concentration displayed a clear cycle with a peak corresponding to the morning transportation rush hour. The local wavelet power spectra of the CO 2 concentration, CO 2 flux and other meteorological elements identified significant cross wavelet powers near the 24-h and 365-day bands for the CO 2 concentration and flux with temperature, wind speed, friction velocity, and turbulent kinetic energy. |
| citation_standardnr | 6147600 |
| datenlieferant | ipn_articles |
| feed_copyright | American Geophysical Union (AGU) |
| feed_copyright_url | http://www.agu.org/ |
| feed_id | 7528 |
| feed_publisher | Wiley-Blackwell |
| feed_publisher_url | http://www.wiley.com/wiley-blackwell |
| insertion_date | 2018-01-27 |
| journalissn | 0148-0227 |
| publikationsjahr_anzeige | 2018 |
| publikationsjahr_facette | 2018 |
| publikationsjahr_intervall | 7984:2015-2019 |
| publikationsjahr_sort | 2018 |
| publisher | Wiley-Blackwell |
| quelle | Journal of Geophysical Research JGR - Atmospheres |
| relation | http://onlinelibrary.wiley.com/resolve/doi?DOI=10.1002%2F2017JD027409 |
| search_space | articles |
| shingle_author_1 | X. L. Cheng, X. M. Liu, Y. J. Liu, F. Hu |
| shingle_author_2 | X. L. Cheng, X. M. Liu, Y. J. Liu, F. Hu |
| shingle_author_3 | X. L. Cheng, X. M. Liu, Y. J. Liu, F. Hu |
| shingle_author_4 | X. L. Cheng, X. M. Liu, Y. J. Liu, F. Hu |
| shingle_catch_all_1 | Characteristics of CO2 Concentration and Flux in the Beijing Urban Area Since February 2012, CO 2 , H 2 O, and wind data at 10 Hz have been measured by the open-path eddy covariance systems at 8, 16, 47, 80, 140, 200, and 280 m above ground level on the 325-m Beijing meteorological tower. Analysis of the data from 2013 to 2016 indicates that the annual averaged CO 2 concentration increased and the local and regional CO 2 emission decreased with the sequestration of background CO 2 concentration. The maximum values occurred during winter and the minimum values occurred during summer. During spring, summer, and autumn, there was a constant CO 2 flux layer from 47 m to 140 m. However, during winter, CO 2 flux increased with height, and the maximum appeared at approximately 140 m and then decreased with height. Above 47 m, the CO 2 fluxes were represented as the net efflux; and below 16 m, the fluxes were near zero or a net uptake. At all observed heights, the diurnal variation in the CO 2 concentration displayed a clear cycle with a peak corresponding to the morning transportation rush hour. The local wavelet power spectra of the CO 2 concentration, CO 2 flux and other meteorological elements identified significant cross wavelet powers near the 24-h and 365-day bands for the CO 2 concentration and flux with temperature, wind speed, friction velocity, and turbulent kinetic energy. X. L. Cheng, X. M. Liu, Y. J. Liu, F. Hu Wiley-Blackwell 0148-0227 01480227 |
| shingle_catch_all_2 | Characteristics of CO2 Concentration and Flux in the Beijing Urban Area Since February 2012, CO 2 , H 2 O, and wind data at 10 Hz have been measured by the open-path eddy covariance systems at 8, 16, 47, 80, 140, 200, and 280 m above ground level on the 325-m Beijing meteorological tower. Analysis of the data from 2013 to 2016 indicates that the annual averaged CO 2 concentration increased and the local and regional CO 2 emission decreased with the sequestration of background CO 2 concentration. The maximum values occurred during winter and the minimum values occurred during summer. During spring, summer, and autumn, there was a constant CO 2 flux layer from 47 m to 140 m. However, during winter, CO 2 flux increased with height, and the maximum appeared at approximately 140 m and then decreased with height. Above 47 m, the CO 2 fluxes were represented as the net efflux; and below 16 m, the fluxes were near zero or a net uptake. At all observed heights, the diurnal variation in the CO 2 concentration displayed a clear cycle with a peak corresponding to the morning transportation rush hour. The local wavelet power spectra of the CO 2 concentration, CO 2 flux and other meteorological elements identified significant cross wavelet powers near the 24-h and 365-day bands for the CO 2 concentration and flux with temperature, wind speed, friction velocity, and turbulent kinetic energy. X. L. Cheng, X. M. Liu, Y. J. Liu, F. Hu Wiley-Blackwell 0148-0227 01480227 |
| shingle_catch_all_3 | Characteristics of CO2 Concentration and Flux in the Beijing Urban Area Since February 2012, CO 2 , H 2 O, and wind data at 10 Hz have been measured by the open-path eddy covariance systems at 8, 16, 47, 80, 140, 200, and 280 m above ground level on the 325-m Beijing meteorological tower. Analysis of the data from 2013 to 2016 indicates that the annual averaged CO 2 concentration increased and the local and regional CO 2 emission decreased with the sequestration of background CO 2 concentration. The maximum values occurred during winter and the minimum values occurred during summer. During spring, summer, and autumn, there was a constant CO 2 flux layer from 47 m to 140 m. However, during winter, CO 2 flux increased with height, and the maximum appeared at approximately 140 m and then decreased with height. Above 47 m, the CO 2 fluxes were represented as the net efflux; and below 16 m, the fluxes were near zero or a net uptake. At all observed heights, the diurnal variation in the CO 2 concentration displayed a clear cycle with a peak corresponding to the morning transportation rush hour. The local wavelet power spectra of the CO 2 concentration, CO 2 flux and other meteorological elements identified significant cross wavelet powers near the 24-h and 365-day bands for the CO 2 concentration and flux with temperature, wind speed, friction velocity, and turbulent kinetic energy. X. L. Cheng, X. M. Liu, Y. J. Liu, F. Hu Wiley-Blackwell 0148-0227 01480227 |
| shingle_catch_all_4 | Characteristics of CO2 Concentration and Flux in the Beijing Urban Area Since February 2012, CO 2 , H 2 O, and wind data at 10 Hz have been measured by the open-path eddy covariance systems at 8, 16, 47, 80, 140, 200, and 280 m above ground level on the 325-m Beijing meteorological tower. Analysis of the data from 2013 to 2016 indicates that the annual averaged CO 2 concentration increased and the local and regional CO 2 emission decreased with the sequestration of background CO 2 concentration. The maximum values occurred during winter and the minimum values occurred during summer. During spring, summer, and autumn, there was a constant CO 2 flux layer from 47 m to 140 m. However, during winter, CO 2 flux increased with height, and the maximum appeared at approximately 140 m and then decreased with height. Above 47 m, the CO 2 fluxes were represented as the net efflux; and below 16 m, the fluxes were near zero or a net uptake. At all observed heights, the diurnal variation in the CO 2 concentration displayed a clear cycle with a peak corresponding to the morning transportation rush hour. The local wavelet power spectra of the CO 2 concentration, CO 2 flux and other meteorological elements identified significant cross wavelet powers near the 24-h and 365-day bands for the CO 2 concentration and flux with temperature, wind speed, friction velocity, and turbulent kinetic energy. X. L. Cheng, X. M. Liu, Y. J. Liu, F. Hu Wiley-Blackwell 0148-0227 01480227 |
| shingle_title_1 | Characteristics of CO2 Concentration and Flux in the Beijing Urban Area |
| shingle_title_2 | Characteristics of CO2 Concentration and Flux in the Beijing Urban Area |
| shingle_title_3 | Characteristics of CO2 Concentration and Flux in the Beijing Urban Area |
| shingle_title_4 | Characteristics of CO2 Concentration and Flux in the Beijing Urban Area |
| timestamp | 2025-06-30T23:32:17.216Z |
| titel | Characteristics of CO2 Concentration and Flux in the Beijing Urban Area |
| titel_suche | Characteristics of CO2 Concentration and Flux in the Beijing Urban Area |
| topic | TE-TZ U |
| uid | ipn_articles_6147600 |