美国国家航空航天局NASA每日一图-2017年8月10日(犹他州摩押附近的太阳能蒸发池 )

Solar Evaporation Ponds Near Moab, Utah

An astronaut aboard the International Space Station took this photograph of solar evaporation ponds outside the city of Moab, Utah. There are 23 colorful ponds spread across 400 acres. They are part of a large operation to mine potassium chloride—more commonly referred to as muriate of potash (MOP)—from ore buried underground. MOP is in high demand as fertilizer because there are no easy substitutes for potassium, an essential nutrient for plant growth.

Each pond color indicates a different state of evaporation. The deep, royal blue color is due to a dye that is added to a full pond of potash brine and water in order to speed up the rate of heat absorption. The seafoam green colors indicate shallower waters (with less dye) that are well into the evaporation process. The tan colored ponds are nearly dry; salt crystals (the final product) are left over in the pond and ready for collection.

Shadows cast on the landscape show the depth and dimension of the surrounding Utah desert. The Colorado Plateau stands at an average elevation of 1600 meters (5200 feet) above mean sea level, in contrast with the Colorado River Valley, with an average elevation of 1200 meters (3900 feet). The darker areas along the river bank are rich in green desert vegetation. Hatch Point Road leads to a scenic overlook for viewing the Cane Creek Anticline.

Astronaut photograph ISS052-E-8757 was acquired on June 26, 2017, with a Nikon D4 digital camera using an 1150 millimeter lens, and is provided by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space Center. The image was taken by a member of the Expedition 52 crew. The image has been cropped and enhanced to improve contrast, and lens artifacts have been removed.

Image Credit: NASA
Caption: Andi Hollier, Hx5, JETS Contract at NASA-JSC

Last Updated: Aug. 10, 2017
Editor: Sarah Loff

犹他州摩押附近的太阳能蒸发池

国际空间站的宇航员拍摄了犹他州摩押市外的太阳能蒸发池的照片。有二十七个五彩缤纷的池塘遍布400英亩。它们是大量开采氯化钾的一部分  - 通常被称为泥土(MOP)的粉碎 - 从埋藏在地下的矿石。作为肥料,MOP需求量很大,因为不容易替代钾,这是植物生长的必需营养素。

每个池塘颜色表示不同的蒸发状态。深蓝色的深蓝色是由于添加到饱和的钾盐水和水中的染料,以加速吸热速度。海绵绿色表示进入蒸发过程的浅水(染料较少)。棕褐色的池塘几乎干燥; 盐水晶体(最终产品)留在池塘中,准备收集。

在风景中投下的阴影显示了周围犹他州沙漠的深度和尺寸。与科罗拉多河谷相比,科罗拉多高原的平均海拔高于平均海平面1600米(5200英尺),平均海拔1200米(3900英尺)。河岸较黑的地区绿色沙漠植被丰富。Hatch Point路可以俯瞰Cane Creek Anticline的景色。

宇航员照片ISS052-E-8757于2017年6月26日被收购,配有Nikon D4数码相机,使用1150毫米镜头,由ISS船员地球观测设施和约翰逊航天中心地球科学与遥感部门提供。该图像由远征52船员的成员  拍摄。已经裁剪和增强了图像以改善对比度,并且已经去除了镜头伪影。

图片来源:NASA
图片:Andi Hollier,Hx5,NASA-JSC的JETS合同

最后更新:2017年8月10日
编辑:莎拉·洛夫

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