the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Evaluation of In-situ observations on Marine Weather Observer during the Typhoon Sinlaku
Wenying He
Hongbin Chen
Hongyong Yu
Jun Li
Jidong Pan
Shuqing Ma
Xuefen Zhang
Rang Guo
Bingke Zhao
Xi Chen
Xiangao Xia
Kaicun Wang
Abstract. The mobile ocean weather observation system, named Marine Weather Observer (MWO), developed by the Institute of Atmospheric Physics (IAP), consists of a fully solar-powered, unmanned vehicle and meteorological and hydrological instruments. One of the MWOs completed a long-term continuous observation, actively approaching the Typhoon Sinlaku center from July 24 to August 2, 2020, over the South China Sea. The in-situ and high temporal resolution(1-min) observations obtained from MWO were analyzed and evaluated by comparing with the observations made by two types of buoys during the evolution of Typhoon Sinlaku. First, the air pressure and wind speed measured by MWO are in good agreement with those measured by the buoys before the typhoon, reflecting the equivalent measurement capabilities of the two methods under normal sea conditions. The sea surface temperature (SST) between MWO and the mooring buoys is highly consistent throughout the observation period and even less difference after the typhoon's arrival, indicating the high stability and accuracy of SST measurements from MWO during the typhoon evolution. The air temperature and relative humidity measured by MWO have significant diurnal variations, generally lower than those measured by the buoys, which may be related to the mounting height of the sensor. When actively approaching the typhoon center, the air pressure from MWO can reflect some drastic and subtle changes, such as a sudden drop to 980 hPa, which is difficult to obtain by other observation methods. As a mobile meteorological and oceanographic observation station, MWO has shown its unique advantages over traditional observation methods, and the results preliminary demonstrate the reliable observation capability of MWO in this paper.
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Wenying He et al.
Status: open (until 18 Oct 2023)
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RC1: 'Comment on amt-2023-120', Anonymous Referee #1, 13 Sep 2023
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The paper is based on the in-situ, high temporal resolution (1-min) observations of the typhoon Sinlaku over the South China Sea from July 24 to August 2, 2020, with a solar-powered, mobile ocean weather observation system, abbreviated as MWO for Marine Weather Observer and developed by China Institute of Atmospheric Physics (IAP). The data has been analyzed and compared with the observations made by 7 buoys, which are close to the MWO. The results from the study, especially on the variation features of meteorological parameters when Sinlaku passed over the MWO, are clearly presented by the paper and shows that the observation system is technically fine and the data obtained are useful for ocean study. It is hoped that the paper can be published after proper modification.
Specific comments and suggestions
- Lines 34-36 and 398-400: “The air temperature …… measured from MWO …… are generally lower than those from the buoys, which may be related to the mounting height of the sensor”. And “the sensor on the mooring buoy can reach up to 10m, on the drifting buoy it may be about 1.5m, and on MWO it is close to 1.2m. The closer the sensor is to the water's surface, the more obvious the impact on the marine environment” as shown Lines 372-374, Does it imply that the “lower” is because of the marine water temperature is cooler than air? Otherwise, the air temperature measured by MWO should be higher than those from the buoys because the normal air temperature gradient. Please consider this further and supply a detailed analysis.
- Please consider if the paragraphs in Section 4 can be concentrated and inserted into Section 3 and
- line 142: The position for“LST”in the caption for Fig. 2 should be adjusted.
- Lines 148-149: The date should be included in addition to the time “1200LST”.
- Lines 227-229: The subgraph Fig.4c is not mentioned in the caption for Fig.4.
- Please consider the difference between Drifted buoys and drifting buoys.
Citation: https://doi.org/10.5194/amt-2023-120-RC1
Wenying He et al.
Wenying He et al.
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