Marine Heatwaves, Upwelling, and Atmospheric Conditions during the Monsoon Period at the Northern Coast of the Gulf of Guinea

Round 1

Reviewer 1 Report

This manuscript reports the variability and regulation mechanisms of upwelling and MHWs at the northern coast of the Gulf of Guinea. A 30-year daily OISST data from the NOAA had been used to figure out the relationships between the marine boundary air and surface ocean. This work could help us to deeply understand that how these changes influence the economies and climate of West Africa. This work was designed and completed well, and would present a valuable contribution to the scientific community.

Before this manuscript be accepted and published, there are still some points should be revised and improved carefully and seriously.

The detailed comments are listed as follows:

1.        There are some problems with the omission of punctuation marks in the manuscript, such as line 73 and line 80.

2.        Abbreviations such as SST and MHW, should be explained when they were expressed first time.

3.        2.1 Was the used data authorized by the NOAA? Generally, these data could be downloaded from website. However, anyone who used it should contact the person in charge, and be authorized firstly. At least, the authors SHOULD express their thanks in ACKNOWLEDGEMENT. It is very necessary and important.

4.        There are two title of 2.1 in line 90 and 115.

5.        I suggest the authors providing a map. Then the readers can understand the study area better.

6.        In line 163 and 164, etc., the symbol is written incorrectly, please revise them.

7.        Line 115 to line 140, the authors applied the methods used by Caniaux et al. and Hobday et al. respectively. However, I suggest the authors state the specific conclusion briefly, instead of give a number only.

8.        The words in some figures are too small to read, such as figure 2b and figure 3c, etc. Moreover, style of figures seems plot for report, not article, such as figure 2, 3 and 6.

9.        Line 227, change ” 10 days and six days” to “10 days and 6 days”. Be consistent in format.

10.    Line 256 to line 257, I suggest the authors providing a figure to show the positive relationship, and estimating it deeper, instead of expressing by words only.

11.    Line 544 to line 545, “Various studies highlighted ocean warming in the tropical Atlantic related to global 544 warming”, so where are the references?

12.    Format of references should be consistent, such as line 612-617.

13.    Lastly, the English grammar in your manuscript should be improved, such as line 124, line 137, line 551, etc.

 

 

Comments for author File: Comments.pdf

Author Response

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Author Response File: Author Response.docx

Reviewer 2 Report

The authors investigated the ‘Marine heatwaves, upwelling and atmospheric conditions during the monsoon period at the northern coast of the Gulf of Guinea’ using a 30-year daily Optimum Interpolation Sea Surface Temperature (OISST) dataset covering 1991-2020. The upwelling surface variability and Marine Heatwaves (MHWs) at the northern coast of the Gulf of Guinea was studied using the May - October data. In general, the 30-year daily SST showed a continuous decrease of the cooling  surface of the coastal upwelling in the study area. The MHWs variability exhibits a frequent occurrence of such events since 2015 that is consistent with the observed oceanic warming over tropical Atlantic in recent decades and with the decrease of up-welling surface.

This is an important results that could help improved our understanding of the impacts of such MHWs variabilities on the occurrences of extreme events in the study area and beyond.

Thus, kindly published the manuscript in your well-read journal after correcting the under-listed errors.

 

#Line 12-25, always write an acronym in full as they appear first, like Optimum Interpolation Sea Surface Temperature (OISST). Do the same for MHW, and other acronyms as they appear in the paper.

#Line 91, it will be more interesting if the author could provide a map showing the details of the study location, and the position with respect to World map or Africa. If any, the author should add more information on why the region is important for the study.

#Line 130-131, the definition of MHW supposed to have come earlier when it was first mentioned under introduction - please correct this.

Author Response

Please see the attachment

Author Response File: Author Response.docx