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多時的なLCZアプローチを用いた半乾燥都市における熱環境変化の評価: インドのプネのケーススタディ
Labani Saha1, Avdhut Patil1, Amit Dhorde2
1Department of Geography, Savitribai Phule Pune University, Pune, Maharashtra, 411007, India.
Environmental monitoring and assessment
|September 1, 2025
まとめ
プネの都市化は,建設面積を大幅に増加させ,2005年から2020年にかけての自然地表を減少させた. この変化により,地表温度 (LST) が顕著に変化し,都市の熱環境に影響を与えました.
科学分野:
- 都市気候学
- リモートセンシング
- 環境科学
背景:
- 急速な都市化により 包摂的で安全で 回復力のある持続可能な都市を 構築することが困難になっています
- 都市圏の拡大が地元の熱環境に与える影響を理解することは 効果的な都市計画に不可欠です
研究 の 目的:
- インドのローカル気候ゾーン (LCZ) を,マルチタイムデータで初めてマッピングする.
- プネの空間的・時間的な成長を20年 (2005年−2020年) 評価する.
- 都市の熱環境,特に地表温度 (LST) への都市拡大の影響を分析する.
主な方法:
- LCZをマッピングするために多時衛星データを利用しました.
- 土地の覆い面の変化を分析し,建築と自然地帯の変容に焦点を当てた.
- LCZの種類や地表の変形によって LSTの量化変化
主要な成果:
- プネは 2005年から2020年の間に建設面積が31%から68.3%に増加し,天然の土地の面積は69%から31.7%に減少しました.
- 陸地表面温度 (LST) は,年間0.2°Cの減少と夜間0.1°Cの上昇を示した.
- 自然の不毛地帯を建設地,特に工業地帯に転換した結果,LSTは大幅に増加しました (昼間は年間0.8°Cまで).
- 乾燥した河床もLSTの増加を示し,プランテーションプログラムは冷却効果を示しました.
結論:
- LSTの変化は,LCZの種類と土地の覆面の変化に強く依存しています.
- プネの周辺地域は 急速で顕著な熱変化を経験しています
- この発見は都市政策と持続可能な都市計画に 重要な意味を持ちます
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