|The revised manuscript ”The influence of anomalous atmospheric conditions at Ny-Ålesund on clouds and their radiative effect” addresses how moisture anomalies are related to cloud properties and cloud radiative effect at Ny-Ålesund in the Arctic. After revision, the paper is now more coherent, and easier to follow. I recommend minor revision, before this paper can be published. |
- Page 2, Line 22: define the time scale of this increase. Is it a seasonal increase, or increase in long-term winter mean (=trend)?
- Page 5, Line 30: The sentence “found FLEXTRA back trajectory files with corresponding reaching time” could be rephrased. Data files do not have to be mentioned, it is enough to tell about the matching time. Specify also what is meant by “reaching time”.
- Page 6, Lines 1-2: what is meant by this: “6-day trajectories are sufficient to capture the air
transportation to the Arctic.”? Why do you need 6 days to capture air mass transport to the Arctic?
- Page 6, line 6: what is meant by this: “Mewes and Jacobi (2019) have shown that a similar horizontal air mass transport happens when air from the North Pacific flows into the Arctic.”? What is” a similar horizontal air mass transport”, especially if it comes from a completely different region?
- Figure 6: This caption must be wrong. (a) is LW and (b) is SW, right?
- Page 8, line 9: I assume 6b shows the SW and not LW. If so, this figure number here is not correct.
- Page 12, lines 17-19: Please rewrite this sentence to make it clearer. A suggestion: “Air masses originating from the North Atlantic are typically associated with increased surface temperature and IWV in the Svalbard region, whereas those originating from North Pacific are linked to a decrease in surface temperature and IWV (Dahlke and Maturilli, 2017).”
- Page 12, lines 20-26: Nice that the sea ice is now mentioned, but I would like to know whether there is a connection between the sea ice decline and IWV trend. Even if you do not quantitatively analyze this, you can estimate it in more detail based on existing literature. Is it likely that the sea ice loss is directly associated with the winter trend in moist anomalies?
- Page 12, lines 20-26: You mentioned that low sea ice coverage in spring and summer can enhance evaporation. In spring this is certainly true, but in summer the evaporation is really small in the sea areas, while most of the evaporation occurs on land.
- Page 12, lines 20-26: I would like to add that reduced sea ice coverage enhances evaporation, but also allows for more efficient transport of moist air masses (without loosing their moisture on the way). So, sea ice also affects the transported moisture. Maybe you could add something like “allows for an increased moisture transport at the location”.
- Summary and conclusions: This section has improved since the first version. However, I recommend some further changes: This section consist of 11 short paragraphs (shortest of them having only two sentences). Either group them so that you have only one (fluently written) paragraph for moist anomalies and one for the dry ones (+ a paragraph in the beginning and 1-2 in the end), or organize your conclusions with numbers/bullet points. In this current format, it is rather difficult to get an clear overview of the nice and valuable results of this study!