海洋透光率仪的设计及其在初级生产力研究中的应用*
许占堂(1980—), 男, 江苏省连云港市人, 副研究员, 从事海洋监测和水色遥感研究。email: |
Copy editor: 林强
收稿日期: 2021-08-03
修回日期: 2021-08-31
网络出版日期: 2021-09-06
基金资助
国家自然科学基金(42076190)
国家自然科学基金(41776044)
国家自然科学基金(U20A20103)
广东省基础与应用基础研究基金项目(2021A1515011538)
中国科学院海洋大科学研究中心重点部署项(COMS2019J10)
南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0602)
广东省海洋经济发展(海洋六大产业)专项(粤自然资合[2020]019号)
Design of marine transmittance instrument and its application in primary productivity research*
Copy editor: LIN Qiang
Received date: 2021-08-03
Revised date: 2021-08-31
Online published: 2021-09-06
Supported by
National Natural Science Foundation of China(42076190)
National Natural Science Foundation of China(41776044)
National Natural Science Foundation of China(U20A20103)
Basic and applied basic Research Foundation of Guangdong Province(2021A1515011538)
Key Deployment Project of Centre for Ocean Mega-Research of Science, Chinese academy of science(COMS2019J10)
Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)(GML2019ZD0602)
Special Project for Marine Economic Development (Six Major Marine Industries) of Guangdong Province (GDNRC2020019)
海洋浮游植物光合作用固碳在全球碳循环中扮演着极为重要的角色, 获取不同光衰减对应的海水深度, 对于采集水样用于海洋初级生产力的研究具有重要意义。本研究于国际上首次开发了无缆便携式海洋透光率仪, 特殊的光学结构设计和光谱滤光技术使得光谱响应在波段400~700nm范围内超过了同类海洋传感器, 特定光衰减下对应的深度误差小于0.5m。将本设备应用于南海中尺度涡旋初级生产力的研究中, 在采样率和自动化方面验证了仪器的便携性; 通过对涡旋中初级生产力的空间分布规律进行分析, 检验了仪器数据结果的可靠性。海洋透光率仪在价格、准确性、可靠度和操作的便携性上具有不可比拟的优势, 将在未来海洋生态环境的研究中发挥重要作用。
许占堂 , 施震 , 谢栢成 , 廖健祖 , 杨跃忠 , 周雯 , 李彩 , 杨顶田 . 海洋透光率仪的设计及其在初级生产力研究中的应用*[J]. 热带海洋学报, 2022 , 41(3) : 38 -45 . DOI: 10.11978/2021099
Carbon sequestration by photosynthesis of marine phytoplankton plays an important role in the global carbon cycle. Obtaining the seawater depth in a condition of different light attenuation is important for studying marine primary productivity by sampling seawater. In this study, a portable marine transmittance instrument without cable was developed, the first in the world. The special optical structure design and spectral filter technology make the spectral response in the band range of 400-700 nm exceed that of similar marine sensors, and the corresponding depth error is less than 0.5 m under the specific light attenuation. The device was applied to the study of mesoscale eddy primary productivity in the South China Sea, and the portability of the instrument was verified in terms of sampling rate and automation. By analyzing the spatial distribution of primary productivity in the vortex, the reliability of the instrument data was tested. Due to its incomparable advantages in price, accuracy, reliability, and portability of operation. Finally, the marine transmittance meter will play an important role in the future research of marine ecological environment.
图2 5mm和6mm光扩散玻璃的消光系数分光光度计测量光孔的影响导致了波形没有完全重叠, 光谱波形在可见光区域的变化很大, 需要后续的光学元件进行校正 Fig. 2 Extinction coefficient of 5- and 6-mm light diffusion glass. The influence of optical hole measured by spectrophotometer leads to the waveform not completely overlapping, and the spectral waveform changes greatly in the visible region, which needs to be corrected by subsequent optical elements |
图6 探头在波长400~700nm范围内对能量的响应a. 理想响应; b. MPAR的响应结果; c. 加拿大Satlantic公司研制的PAR响应率(摘自Satlantic PAR 技术说明书) Fig. 6 Response of the probe to energy in the wavelength range of 400-700 nm, where (a) is the ideal response; (b) is the response result of MPAR; (c) PAR response rate developed for Satlantic, Canada. Taken from the Satlantic PAR specification. |
图8 初级生产力采样站位点该图基于国家测绘地理信息局标准地图服务网站下载的审图号为GS(2019)1825号的标准地图制作。平均海面高度距平图基于2018年9月1日至21日的数据, 海面高度负值表示气旋式涡旋, 正值表示反气旋式涡旋 Fig. 8 Sampling stations of primary production in the study area. Map of average sea surface height anomaly bases on the data from September 1 to 21, 2018. The negative sea surface height value indicates cyclonic eddy, and positive value denotes anticyclonic eddy. Station A was chosen since it was located at the center of cyclonic eddy |
表1 4个站位中不同衰减比例所对应的水深值Tab. 1 Water depth values corresponding to different attenuation ratios at four stations |
太阳光在水中的衰减 比例/% | 水深/m | |||
---|---|---|---|---|
S1 | S2 | S3 | S4 | |
100 | 0 | 0 | 0 | 0 |
56 | 3 | 3 | 3 | 3 |
22 | 16 | 14 | 15 | 14 |
7 | 40 | 28 | 71 | 38 |
1 | 68 | 54 | 92 | 94 |
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