Monthly Archives: May 2022

疫情下的国高学生:Sixth Tone深度报道

“Moreover, I have already studied the international curriculum for a whole semester and prepared for the TOEFL language proficiency test. I don’t want to start all over again for the gaokao. It’s a whole different curriculum that requires another three years of tough preparation,” Nan said. “My mom supported my decision. She knew I didn’t handle the pressure from zhongkao well and she’s worried I won’t be able to survive the gaokao,” she added.

“My major was not decided when I applied for the school. I wish to explore where my passion is through various courses and activities,” Nan said. “Life there could be very different from home. Though it could take me a while before I get accustomed to it, I am still looking forward to experiencing some new culture.”

Continue reading

最近几个工作进展

  • Yin Z, Nan Z*, Cao Z, Zhang G. Evaluating the applicability of a quantile-quantile adjustment approach for downscaling monthly GCM projections to site scale over the Qinghai-Tibet Plateau. Atmosphere. 2021, 12(9): 1170. (链接

这是一个本科生的工作,在青藏高原上验证了一个降尺度方法的适用性。我们其实在里面提出来了我们的改进方案,但不想开展后续工作了,感觉只是技术细节。这位本科生保送了北京大学直博。

  • Hu J, Nan Z*, Ji H. Spatiotemporal characteristics of NPP changes in frozen ground areas of the Three-River Headwaters Region, China: a regional modeling perspective. Frontier in Environmental Sciences. 2022, 10. doi:10.3389/feart.2022.838558.

我们关于三江源不同冻土类型对NPP影响的一个初步工作,大概结论是多年冻土区比季节冻土区NPP更小,但有更大的NPP变化速率。第一作者正延着此方向工作,后续会有新的进展。

  • Ji H, Nan Z*, Hu J, Zhao Y, Zhang Y. On the spin-up strategy for spatially modeling permafrost dynamics: A case study on the Qinghai-Tibet Plateau. Journal of Advances in Modeling Earth Systems. 2022, 14(3). doi:10.1029/2021MS002750.

这是我硕士生的工作。我发几个帖子描述关于这个论文的审稿过程,感触颇多。我们通过很全面的试验,说明了利用陆面过程模型模拟区域冻土水热状况变化/退化,一定要合适选择预热策略。不合适的模型预热策略会导致模拟结果的很大偏差,这个偏差会大到使得模拟退化速率无效。我们推荐至少500年的预热长度和多年循环的预热驱动方案(当然这个推荐可能不同模型不一样)。这些发现应该对我们的冻土区域模拟工作会有所启示。

  • Zhao Y, Nan Z*, Ji H, Zhao L. Convective heat transfer of spring meltwater accelerates active layer phase change in Tibet permafrost areas. The Cryosphere. 2022, 16: 825-849. doi:10.5194/tc-16-825-2022.

Cryosphere应该算是冰冻圈领域最好的专业期刊了吧,就是审稿太慢,前后花了1年时间。这个工作通过SHAW模型代码层面的修改对比分析了对流传热对冻土活动层水热过程的影响。亮点在于我们发现夏季融雪的对流传流起到加带活动层相变的作用。