“Land radiative management” (LRM)—deliberately increasing surface albedo to decrease temperatures—has been proposed as a form of geoengineering to mitigate the effects of regional warming. Here, we show that, contrary to expectations, LRM causes temperatures to increase in surrounding regions. The basic reason for the increase is unintended impacts on precipitation. Precipitation is suppressed over the LRM region, but this effect also extends to nearby areas unprotected by LRM. The reduction in precipitation and soil moisture in these regions leads to higher temperatures than would be expected in the absence of LRM. The resulting warming outside the LRM region is comparable to the cooling achieved inside it. This implies that, if wealthy regions unilaterally adopt LRM to cool, their neighbors may experience warming, worsening heat inequality.

中文翻译：

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陆地辐射管理导致的意外变暖


“陆地辐射管理”（LRM） — 故意增加表面反照率以降低温度 — 已被提议作为地球工程的一种形式，以减轻区域变暖的影响。在这里，我们表明，与预期相反，LRM 会导致周边地区的温度升高。增加的基本原因是对降水的意外影响。LRM 区域的降水受到抑制，但这种影响也会延伸到附近不受 LRM 保护的区域。这些地区的降水和土壤水分减少导致温度高于在没有 LRM 的情况下的预期温度。LRM 区域外产生的变暖与其内部实现的冷却相当。这意味着，如果富裕地区单方面采用 LRM 来降温，他们的邻国可能会经历变暖，从而加剧热不平等。