コロラド川の流れは,温暖化による反射雪の減少が蒸発を活性化するにつれて減少する
1U.S. Geological Survey, Princeton, NJ, USA. cmilly@usgs.gov.
まとめ
コロラド川の排水は気候の温暖化に非常に敏感であり,蒸発の増加により,コロラド川の流れは1°Cあたり9.3%減少している. 予想される降水量は この乾燥傾向を相殺できず 水不足のリスクを高めます
科学分野:
- 水学
- 気候科学
- 環境科学
背景:
- 川の排水が気候温暖化に敏感であることは不確かであり,適応を妨げています.
- コロラド川は経済活動に不可欠ですが 干ばつと温暖化により 減少しています
- 管理プロセスを理解することは 水資源の管理に不可欠です
研究 の 目的:
- 川の排水感度の差を解決する.
- 温暖化下の川の排水を制御する物理的プロセスを特定する.
- コロラド川流域の水資源を予測する
主な方法:
- モンテカルロのシミュレーションアプローチを利用した.
- 放射能に敏感な水学モデルを使用した.
- 蒸発と雪の覆いに対する気候システムの温暖化の影響を分析した.
主要な成果:
- 年間平均排出量は 温暖化1度当たり9.3%減少しました
- 主な原因は 雪の減少と太陽の反射による 蒸発の増加です
- 予想される降水量の増加は,熱力学的に誘発された乾燥を完全に相殺する可能性は低い.
結論:
- 川の排水は 気候温暖化に非常に敏感です
- 温暖化による乾燥は 深刻な水不足の危険性を高めています
- 気候変動に効果的に適応するには 水質学的な感受性を理解する必要があります
関連する概念動画
Adaptations that Reduce Water Loss
27.8K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
27.8K
Responses to Drought and Flooding
11.8K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
11.8K
Regulation of Water Output
1.9K
The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
1.9K
Precipitation Processes
4.5K
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
4.5K
Global Climate Change
28.4K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
28.4K
Rapidly Varying Flow
348
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
348


