多年前在一次航空遥感实验的低空飞机上随手拍了几张景观照片,回来惊喜地发现效果如此神奇,其宏大的场面为地面照片所无法比拟。以后不断尝试在民航航班航高较低时抓拍,虽然很多时候是徒劳,但是不乏意外的惊喜。鸟瞰这个星球的时候,有了对地表自然覆盖和人类驱动的全新尺度和角度的理解,有了认识自然美的新视角。在这里分享几幅效果尚可的航拍照片。

Airborne Photos  Photographer: JIA Gensuo



在美国西部一个山间低地,沿着河谷和冲积扇分布着绿洲植被和湖泊,即使在云影下这些基本的覆盖单元也清晰可辨,而这里云层的分布也很有特点。地点:美国怀俄明州  [Rivers, lakes, and riparian vegetation are clearly visible even under cloud shadows over mountain foothills in Wyoming. Clouds are identical over wetlands.]



已是6月下旬的北极北冰洋海岸,部分湖面依然有冰雪覆盖。片段分布的苔原植被刚刚有开始生长的迹象,而多边形(polygon)冻融地表形态也隐约可见。地点:加拿大北极  [Lakes are still covered by snow and ice in late June near coast of the Arctic Ocean. Tundra plants just start to grow around polygons and frost-boils.]



在美国中西部落基山以东,自然草原(prairie)、人工灌溉草地、和河漫滩湿地构成景观镶嵌体。地点:美国科罗拉多州  [Mosaic of prairie, pasture, and wetlands in northern Colorado.]



在盛夏时节,高海拔的积雪和山地冰川、高山草甸、与山地针叶林形成鲜明的垂直地带分布。地点:美国西部  [Vertical zonation of snow and glacier, alpine meadow, and coniferous forests in western US in mid summer.]



一条内陆河流在荒漠中蜿蜒而过,形成一个带状的河谷湿地,分布着茂密的灌丛,而荒漠中非常稀疏的小灌丛也依稀可见。地点:美国内华达州  [Dense riparian vegetations are established along an inland river that snakes in vast desert that is covered with very sparse shrubs. Location: Nevada]



北京北部的燕山山脉,植被的垂直带分布和不同坡向植被分布规律明显,在低山和沟谷集中这密集的居民点和农田。在5月下旬,海拔较高的地段植被还没有完全返青。地点:北京北部山区  [Distribution of vegetation is shaped by elevation and slopes in this temperate mountain in northern Beijing, with late vegetation onset on mountain tops. Valleys are largely cultivated.]



在沙漠腹地,各种形态的沙丘与一些丘间低地交错分布。地点:腾格里沙漠  [Mosaic of sand dunes and lowland oasis in the Tengri Desert.]



美国中北部一片近期火灾后的森林正在恢复中,这里植被覆盖度、地形部位、道路等都影响了火灾的扩散。地点:美国蒙大拿州  [Forests are recovering from a recent wildfire. Fire severity was apparently affected by canopy cover, terrain, and road barrier.]



在这片相对干燥的低山区域,疏林和灌丛主要分布于沟谷和低洼的地形部位,在其西侧城市外围一直扩展到山脚缓坡。地点:美国加州东部  [Woodlands and shrubs spread over valleys in this semi-arid mountain, where urban expansion is stopped at its foothills.]



在干旱半干旱区域,水资源作为主要的生态限制因子,也直接影响着土地利用方式。这里居民点主要分布于河谷两侧,灌溉的人工草地和种植园(几何形状斑块)生产力明显高于背景的自然草原植被。地点:美国科罗拉多州  [Water is a key limiting ecological factor for natural vegetation and landuse in drylands. Here, residences are mainly built near rivers, while irrigated pastures are much greener than background grassland.]



经过近年来的大规模防护林建设,一些土壤侵蚀严重的低山丘陵正在恢复森林覆盖,一定程度上保护着周围的农田和村庄,这在生长季节初期尤为重要。地点:中国东北 [Woodlands return to these severely eroded hills after decade of ecological restoration efforts, and provide protection for croplands and villages in northeast China. Such ecosystem service is especially important in early growing season.]

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