Publication date: June 2017
Source:Atmospheric Environment, Volume 159
Author(s): Siyang Cheng, Xingqin An, Lingxi Zhou, Pieter P. Tans, Andy Jacobson
In order to explore where the source and sink have the greatest impact on CO2 background concentration at Waliguan (WLG) station, a statistical method is here proposed to calculate the representative source-sink region. The key to this method is to find the best footprint threshold, and the study is carried out in four parts. Firstly, transport climatology, expressed by total monthly footprint, was simulated by FLEXPART on a 7-day time scale. Surface CO2 emissions in Eurasia frequently transported to WLG station. WLG station was mainly influenced by the westerlies in winter and partly controlled by the Southeast Asian monsoon in summer. Secondly, CO2 concentrations, simulated by CT2015, were processed and analyzed through data quality control, screening, fitting and comparing. CO2 concentrations displayed obvious seasonal variation, with the maximum and minimum concentration appearing in April and August, respectively. The correlation of CO2 fitting background concentrations was R2 = 0.91 between simulation and observation. The temporal patterns were mainly correlated with CO2 exchange of biosphere-atmosphere, human activities and air transport. Thirdly, for the monthly CO2 fitting background concentrations from CT2015, a best footprint threshold was found based on correlation analysis and numerical iteration using the data of footprints and emissions. The grid cells where monthly footprints were greater than the best footprint threshold were the best threshold area corresponding to representative source-sink region. The representative source-sink region of maximum CO2 concentration in April was primarily located in Qinghai province, but the minimum CO2 concentration in August was mainly influenced by emissions in a wider region. Finally, we briefly presented the CO2 source-sink characteristics in the best threshold area. Generally, the best threshold area was a carbon sink. The major source and sink were relatively weak owing to less human activities and vegetation types in this high altitude area. CO2 concentrations were more influenced by human activities when air mass passed through many urban areas in summer. Therefore, the combination of footprints and emissions is an effective approach for assessing the source-sink region representativeness of CO2 background concentration.
from #MedicinebyAlexandrosSfakianakis via xlomafota13 on Inoreader http://ift.tt/2oekSqJ
via IFTTT
Αρχειοθήκη ιστολογίου
-
►
2020
(289)
- ► Φεβρουαρίου (28)
-
►
2019
(9071)
- ► Δεκεμβρίου (19)
- ► Σεπτεμβρίου (54)
- ► Φεβρουαρίου (3642)
- ► Ιανουαρίου (3200)
-
►
2018
(39872)
- ► Δεκεμβρίου (3318)
- ► Σεπτεμβρίου (3683)
- ► Φεβρουαρίου (2693)
- ► Ιανουαρίου (3198)
-
▼
2017
(41099)
- ► Δεκεμβρίου (3127)
- ► Σεπτεμβρίου (2173)
-
▼
Απριλίου
(6024)
-
▼
Απρ 09
(366)
- Whole-exome sequencing identifies a homozygous don...
- Delayed right chylothorax after left blunt chest t...
- Remarkable response to fluorouracil, leucovorin, o...
- IL6 is associated with response to dasatinib and c...
- Cleft Palate Repair without Lateral Relaxing Incision
- Free-style Deepithelialized Propeller Flaps: An Id...
- Delayed right chylothorax after left blunt chest t...
- Remarkable response to fluorouracil, leucovorin, o...
- Outcome of recurrent and metastatic head and neck ...
- Outcome of recurrent and metastatic head and neck ...
- IL6 is associated with response to dasatinib and c...
- Vapor-Phase-Gating-Induced Ultrasensitive Ion Dete...
- Retraction: ‘Dose-dependent dual effect of HTLV-1 ...
- Half knowledge is worse than ignorance....... Impe...
- Issue Information - TOC
- Characterization of the effect of a new commercial...
- Clinical outcomes of helical conformal versus non-...
- Half knowledge is worse than ignorance....... Impe...
- Half knowledge is worse than ignorance....... Impe...
- Reduced rate of human papillomavirus infection and...
- What is the clinical significance of esophagogastr...
- LunHab: Interactive effects of a 10-day sustained ...
- Corrigendum
- Corrigendum
- Roger Cotton Histopathology Prize 2016
- Issue Information
- "Med Oral Patol Oral Cir Bucal"[jour]; +17 new cit...
- "Med Oral Patol Oral Cir Bucal"[jour]; +17 new cit...
- "Med Oral Patol Oral Cir Bucal"[jour]; +17 new cit...
- SIRT1 and AMPK pathways are essential for the prol...
- Squamous cell carcinoma arising from lupus vulgari...
- First report of stereotactic body radiotherapy for...
- Prominent myalgia-an important clue in the diagnos...
- The emerging role of endoscopic ultrasound for pan...
- Discrepancy in prevalence of Huntington's disease ...
- Multiple biomarkers improve the prediction of mult...
- Housing accessibility problems for people with Par...
- Psychiatric Symptoms in Patients with Cushing’s Sy...
- Genome-wide characterization and expression analys...
- The complete mitochondrial genome of a threatened ...
- Effects of Diode Laser, Gaseous Ozone, and Medical...
- The Demographic Study of Otorhinolaryngological Tr...
- The Demographic Study of Otorhinolaryngological Tr...
- The role of vitamin D in the endocrinology control...
- Magee equations and oncotype DX ® -a perspective
- Effect of occupational exposure to lead on new ris...
- Effect of occupational physical activities on vert...
- Congenital anomalies: an under-evaluated risk of c...
- Predictive value of work-related self-efficacy cha...
- Elevated ambient temperatures and risk of neural t...
- Mustard gas exposure and mortality among retired w...
- Importance of updating old cohorts for new findings
- Non-occupational physical activity levels of shift...
- Risk factors for leptospirosis seropositivity in s...
- Lifting and exertion injuries decrease after imple...
- Work-related musculoskeletal disorders among const...
- Underemployment and mental health: comparing fixed...
- Comparison of competency priorities between UK occ...
- Injuries Among School-aged Children of Immigrants
- Traumatic multiple cervical spine injuries in a pa...
- The many facets of motor learning and their releva...
- Reproducibility, and sensitivity to motor unit los...
- Mitochondrial DNA variants in colorectal carcinoge...
- Eosin fluorescence: A diagnostic tool for quantifi...
- Technological advances for improving adenoma detec...
- Intraoperative real-time assessment of blood flow ...
- Potential of autogenous or fresh-frozen allogeneic...
- Airway management includes reporting unsafe practices
- Primary pigmented nodular adrenocortical disease: ...
- Airway management includes reporting unsafe practices
- Airway management includes reporting unsafe practices
- Age-dependent development of left ventricular wall...
- Heterozygous HNRNPU variants cause early onset epi...
- Analysis of implantation and ongoing pregnancy rat...
- Laparoscopic Colorectal Surgery for Cancer: What I...
- LERLIC-MS/MS for In-depth Characterization and Qua...
- Osmopriming with CaCl 2 improves wheat ( Triticum ...
- Perfluoroalkyl substances with isomer analysis in ...
- Resilience potential of an Indian Ocean reef: an a...
- Processed milk waste recycling via thermal pretrea...
- Effect of nutrients on Chlorella pyrenoidosa for t...
- Korean Ministry of Environment’s web-based visual ...
- Toxicological assessment of tungsten oxide nanopar...
- Real-world treatment patterns in advanced pancreat...
- Detection of Ligand-activated G Protein-coupled Re...
- Influenza vaccination responses: Evaluating impact...
- Identification and characterization of enhancer ag...
- Vaccination and blood sampling acceptability durin...
- Unique Rash After Beach Vacation
- Open-source Single-particle Analysis for Super-res...
- Efficacy of a novel, protein-based pneumococcal va...
- Comparison of the nine polymorphic membrane protei...
- Investigation of phosphorylated adjuvants co-encap...
- Editorial Board/Aims and Scope
- Expansion and retention of pulmonary CD4+ T cells ...
- Single N277A substitution in C2 of simian immunode...
- Plant-made virus-like particle vaccines bearing th...
- Assessment of sex-specific differences in adverse ...
- Corrigendum to “Preclinical studies on new protein...
- BEA Fungal Contaminant III
-
▼
Απρ 09
(366)
-
►
2016
(13807)
- ► Δεκεμβρίου (700)
- ► Σεπτεμβρίου (600)
- ► Φεβρουαρίου (1350)
- ► Ιανουαρίου (1400)
-
►
2015
(1500)
- ► Δεκεμβρίου (1450)
Ετικέτες
Κυριακή 9 Απριλίου 2017
Atmospheric CO2 at Waliguan station in China: Transport climatology, temporal patterns and source-sink region representativeness
Εγγραφή σε:
Σχόλια ανάρτησης (Atom)
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου