Projection of Rainfed Rice Yield Using CMIP6 in the Lower Lancang–Mekong River Basin

Round 1

Reviewer 1 Report

This paper deals with an interesting topic. The present study contains a lot of data as well as the authors have made a remarkable effort in writing the manuscript. However, the discussion part is very short, so the results must be rewritten and discussed, compared with previous studies, and given a scientific explanation of the results. Also, the conclusion part is very long. Here is some additional details.

 

• The main question addressed by the research is the impact of climatic changes on grain production in the Lower Lancang–Me-kong River Basin (LMB) based on climate projection data before CMIP6
  
   
• I think topic is relevant in the field and it address a specific gap in the field of the study  
• I think this manuscript enriched the studied area and is related to the previous publication of coauthors Dong Z, Liu H, Baiyinbaoligao, et al. Future projection of seasonal drought characteristics using CMIP6 in the Lancang-Mekong River Basin. Journal of Hydrology, 2022, 610, 127815. https://doi.org/10.1016/j.jhydrol.2022.127815
  -  Regarding the methodology: The authors used Penman-Monteith method, which relies on temperature observations to calculate reference evapotranspiration.  The usage of Hargreaves method to calculate PET (Hargreaves and Samani, 1985) is a straightforward method that previously used. 
•  The conclusions consistent with the evidence and arguments presented  
• Tables and figures are representative and adequately

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

I have read the manuscript “Projection of rainfed rice yield using CMIP6 in the Lower Lancang–Mekong River Basin”. Agronomy should be an appropriate journal. However, I think there are some ambiguous indications for this paper to be published in this journal. I recommend a minor revision.

 

The current manuscript claimed that the strong impact of climate change on rice production in the Lower Lancang-Mekong River Basin is described in this article. This study used a crop growth model to simulate and predict rice yield in the Lower Lancang-Mekong River Basin based on the latest CMIP6 climate projections and three emission scenarios. The results indicate that rice yield will increase in the future, with the largest increase observed in the SSP5-8.5 scenario. Precipitation is found to be insignificant and correlated with yield to a low degree. The first apparent thing in the manuscript is interesting, and the subject and scope are inspiring for the journal. However, I do have some concerns that need to be raised, Overall, the manuscript would greatly benefit from presenting a clear experimental design (a brief figure for the experimental design and its relative position) and statistics analysis (including a clear indication for all the statistics, like correlation tests); I also believe this manuscript will require careful proofing by an English first language writer who is familiar enough with the scientific content to present the technical parts of the narrative properly. At the same time, figure legends should be checked and detailed according to the figure’s meaning.

 

Please see attached comments for specifics.

1. Abstract and the content, lack of application, and importance of the whole article.
2. Abstract and Introduction “CMIP6” Please also add the full name.
3. Introduction, please integrate the statement and context referring to the predictions of rice yields may be presented in a modified table.
4. Discussion, please add the details or reword the last sentence, “The correlation between the rice yield and temperature gradually weakened with the increasing temperature and then changed from positive to negative under the low emission scenario”

 

 I hope these comments are useful.

 

Sincerely Yours,

Best regards,

I have read the manuscript “Projection of rainfed rice yield using CMIP6 in the Lower Lancang–Mekong River Basin”. Agronomy should be an appropriate journal. However, I think there are some ambiguous indications for this paper to be published in this journal. I recommend a minor revision.

 

The current manuscript claimed that the strong impact of climate change on rice production in the Lower Lancang-Mekong River Basin is described in this article. This study used a crop growth model to simulate and predict rice yield in the Lower Lancang-Mekong River Basin based on the latest CMIP6 climate projections and three emission scenarios. The results indicate that rice yield will increase in the future, with the largest increase observed in the SSP5-8.5 scenario. Precipitation is found to be insignificant and correlated with yield to a low degree. The first apparent thing in the manuscript is interesting, and the subject and scope are inspiring for the journal. However, I do have some concerns that need to be raised, Overall, the manuscript would greatly benefit from presenting a clear experimental design (a brief figure for the experimental design and its relative position) and statistics analysis (including a clear indication for all the statistics, like correlation tests); I also believe this manuscript will require careful proofing by an English first language writer who is familiar enough with the scientific content to present the technical parts of the narrative properly. At the same time, figure legends should be checked and detailed according to the figure’s meaning.

 

Please see attached comments for specifics.

1. Abstract and the content, lack of application, and importance of the whole article.
2. Abstract and Introduction “CMIP6” Please also add the full name.
3. Introduction, please integrate the statement and context referring to the predictions of rice yields may be presented in a modified table.
4. Discussion, please add the details or reword the last sentence, “The correlation between the rice yield and temperature gradually weakened with the increasing temperature and then changed from positive to negative under the low emission scenario”

 

 I hope these comments are useful.

 

Sincerely Yours,

Best regards,

Author Response

Please see the attachment.

Author Response File: Author Response.docx