Greenland-Ice-Sheet Surface Temperature and Melt Extent from 2000 to 2020 and Implications for Mass Balance
Round 1
Reviewer 1 Report
This paper has a good and innovative objective of establishing long-term ice sheet temperature and melt to understand the implications of mass balance. Though good techniques and methods are used to achieve the same, a bit of increased focus on relating the mass balance with the time-series of temperature and melt would have been better in addition.
Author Response
Thank you for your careful suggestion. We have corrected in the revised manuscript. Please see the attachment.
Author Response File: 
Author Response.docx
Reviewer 2 Report
Major: This study applied MODIS LST product (2000-2020) to analyze the spatiotemporal variations of surface temperature over the GrIS. They also showed the characteristics of cumulative melting extent. They tried to figure out the link between changes in summer LST and MB in GrIS. The research topic is quite interesting but there are some questions which need to be clarified.
1. Line 271: Fig. 8 (a),(b), (c), melt days anomaly could be negative for summer 2002 (a), 2012 (b) and 2019 (c). What do you mean by melt days anomaly? You should provide its definition in the paragraph.
2. The manuscript did not provide an estimation of melting. The authors did show the melt extent variations. The title may need to change.
Minors: there are too many sentences which are difficult to understand. The grammar, citation format and the style of the manuscript should be checked.
Line 2: Title, one space should be removed.
Line 17: the unit should be written in lowercase letter.
Line 21: one space should be removed. Check the full manuscript!
Line 23: the top two warmest summers?
Line 36: warming 1? Please double check the correct citation format. Check the full manuscript!
Line 41: give the full name of GrIS!
Line 40: a long time 24. It should be the second one? Please double check.
Line 47: Error!
Line 49: the GrIS, check the full manuscript.
Line 77: the GrIS, please use the short name you provided previously.
Line 79-82: What is MODIS LST? Give the full name when it appears for the first time! Is there any other studies conducted the analysis using MODIS LST product? No one?
Line 99: what did they (Qie 39) do? Why you can follow him/her?
Line 113: the variable in equation（1）should be exactly defined. The Italics should be used.
Line 125-132: provide the meaning of NAO and GBI. Again, note the citation format in line 132.
Line 138: space removed!
Line 145-146: melting occurs?
Line 152: The definition of ephemeral melting should be provided earlier.
Line 156: Midwest? Where?
Line 159-160: the sentence should be rewritten.
Line 166: the EGP and KPC were 0.98 and 0.99-> what is EGP, KPC? They are the name of the automatic meteorological station.
Line 247: One blank should be removed.
Line 256: who experienced the severe melting? The GrIS or summers?
Line 281: No, D should be affected by sea surface temperature but not air temperature.
Line 304: One blank is redundant. Please check the full manuscript.
Line 316, Line 329: check the citation format
Line 332: What do you mean by data filtering?
Line 339-341: move to the data section.
Line 350: SON or autumn, it would be better to keep one of them through the full manuscript.
Author Response
Thank you for your careful review and constructive suggestions. According to the detailed comments, we have carefully revised the structure and content of our manuscript and checked the grammar and wording of the full text to improve the language and style. Please see the attachment.
Author Response File: Author Response.docx
Reviewer 3 Report
Review of paper Greenland ice sheet surface temperature and melt from 2000 to 2020 and implications for mass balance by Zhenxiang Fang, Ninglian Wang, Yuwei Wu, and Yujie Zhang
I recommend publication with minor corrections to clarify the text.
It is not clear how you calculate percentage of extreme melting 89.9% and 89.7% percentage of the surface area. One can understand that almost 90% of the surface ice melted, which is not true.
I think ephemeral is not a proper word for short-time melting, it is better to use just short period of melting
Give a clear formulation of met extent and how you calculate it from pixels. It is not clear at present.
Please put references into square brackets [ ]. Mind subscripts and superscripts.
Give explanation of all abbreviations. Give more explanations even if it seems very clear for you. Your paper may be interesting to wide public not always specialists. For example, what is discharge D and how you calculate it.
Change KM to km. Use AMS everywhere not aws, and so on. Please check careless writing. Only one example line 101 “temperature is Less than…”
Figure 1, what are the contour lines? Elevation? Ice thickness? Meters?
Figure 2. Modis is also observed temperature. Please indicate that the data is from weather stations
What is abscissa in Fig 5: 6/1 7/1 8/1
Eugene Morozov, Shirshov Institute of Oceanology, Moscow
Author Response
Thank you for your careful review and constructive suggestions. According to the detailed comments, we have carefully revised the structure and content of our manuscript and checked the grammar and wording of the full text to improve the language and style. Please see the attachment.
Author Response File: Author Response.docx
