在西藏东南部高大气水平的溶解有机沉积
Wei Wang1,2, Xingyu Liu1, Lixue Guan2
1College of Resources and Environmental Sciences, Tibet Agriculture & Animal Husbandry University, Nyingchi, 860000, China.
Heliyon
|November 11, 2024
概括
在西藏的沉积.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 生态生态学 生态生态学
背景情况:
- 沉积是一个关键的全球变化因素.
- 在季风运输中Yarlung Tsangpo大峡谷的作用是显著的.
- 该地区的沉积特征在很大程度上是未知的.
研究的目的:
- 为了量化Yarlung Tsangpo大峡谷的气沉积流.
- 为了确定占主导地位的物种及其与降水的关系.
- 了解西藏东南部沉积的季节性模式.
主要方法:
- 在高度梯度 (22004600米) 上建立了五个监测站点.
- 量化大量沉积流,包括溶解的有机 (DON), (NH4+) 和酸盐 (NO3-).
- 分析了沉积流,降水和土地利用之间的相关性 (偏远地区与人口集中地区).
主要成果:
- 平均降水量为1127.7毫米.
- 溶解有机 (DON) 是占主导地位的物种 (16.80 kg N ha-1 yr-1).
- 氨 (NH4+-N) 和 (NO3--N) 的流量分别为4.92和1.49公斤N ha-1 yr-1.
- 总溶解 (TDN),DON和NH4+-N沉积与降水正相关.
- NO3-N沉积与偏远地区的降水相关,但不是人群集中地区.
- TDN,DON和NH4+-N沉积在植物生长季节达到峰值.
结论:
- 在Yarlung Zangbo大峡谷中大气中的沉积主要是由降水驱动的.
- 溶解有机 (DON) 是沉积的主要形式.
- 氨 (NH4+-N) 是第二大贡献者,而酸盐 (NO3--N) 的作用有限.
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