在沙漠土壤下面的酸盐储存库
Michelle A Walvoord1, Fred M Phillips, David A Stonestrom
1U.S. Geological Survey, Lakewood, CO 80225, USA. walvoord@usgs.gov
概括
在干旱的地下发现了大量的储量,影响了全球分布的估计. 这种被忽视的酸盐积累造成了地下水污染的风险,由于潜在的动员.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 地质化学 地质化学
背景情况:
- 全球分布模型忽略了地下大量的酸盐储备.
- 干旱地区在地下区域积累了大量的生物可利用,主要是酸盐.
研究的目的:
- 量化以前被低估的干旱地下土壤中的储量.
- 评估这种地下对全球和区域库存的影响.
- 评估地下酸盐积累对营养动态和地下水质量的影响.
主要方法:
- 对干旱地区地下区域中分布的分析.
- 考虑到地下积累的瓦多斯区气库存的估计.
- 评估酸盐的动员潜力.
主要成果:
- 在干旱的地下土壤中存在大量的生物可利用 (高达10^4公斤N/ha).
- 地下增加了全球14-71%的热沙漠和干旱灌木的气估计.
- 地下酸盐的积累与长期的土壤浸有关.
结论:
- 干旱地区地下酸盐的积累是全球循环的关键,被忽视的组成部分.
- 这座水库对区域和全球气预算产生了重大影响.
- 潜在的地下酸盐动员引发了人们在土地使用或气候变化下对地下水污染的担忧.
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