Indian Institute of Tropical Meteorology, Pune, India.
Environ Sci Pollut Res Int. 2014 Apr;21(7):5066-75. doi: 10.1007/s11356-013-2386-2. Epub 2013 Dec 28.
Ship-based observations of atmospheric carbon dioxide (CO2) concentration over the Bay of Bengal (BoB) between 17 July 2009 and 17 Aug 2009 offered an excellent opportunity to evaluate the land-ocean contrast of surface CO2 and facilitated its comparison with model simulated CO2 concentrations. Elevated values of CO2 with large variability near the coastal region and relatively low values with correspondingly lower variability over the open ocean suggest that this observed CO2 variability over the ocean essentially captures the differences in terrestrial and oceanic CO2 fluxes. Although the region under investigation is well known for its atmospheric intraseasonal oscillations of Indian summer monsoon during July and August, the limited duration of observations performed from a moving ship in a research cruise, is not able to capture any high-frequency variability of atmospheric CO2 concentrations. But band-passed sea surface temperature and wind anomalies do indicate strong intraseasonal variability over the study region during the observational period. The synoptic data, albeit quite short in duration, thus offer a clear benchmark for abrupt variability of CO2 concentration between land and ocean.
基于船舶的大气二氧化碳（CO2）浓度观测，在 2009 年 7 月 17 日至 2009 年 8 月 17 日期间对孟加拉湾（BoB）进行了观测，这为评估陆海表面 CO2 的对比提供了极好的机会，并有助于与模型模拟的 CO2 浓度进行比较。在沿海地区附近，CO2 浓度较高且具有较大的可变性，而在开阔海域，CO2 浓度相对较低，可变性相应较低，这表明海洋上观测到的 CO2 变化基本上捕捉到了陆地和海洋 CO2 通量的差异。尽管该研究区域以其 7 月和 8 月印度夏季季风的大气季节性内振荡而闻名，但在研究航次中从移动船舶上进行的有限持续观测，无法捕捉到大气 CO2 浓度的任何高频可变性。但是，带通海表温度和风异常确实表明，在观测期间，研究区域的季节性内变化非常强烈。尽管这些天气数据持续时间相当短，但它们为陆地和海洋之间 CO2 浓度的突然变化提供了明确的基准。
