Determination of precipitable water and cloud liquid water over oceans from the NOAA 15 advanced microwave sounding unit
Determination of precipitable water and cloud liquid water over oceans from the NOAA 15 advanced microwave sounding unit
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DOI：
10.1029/2000jd900616
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发表时间：
2001-02
影响因子：
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通讯作者：
N. Grody;Jiang Zhao;R. Ferraro;F. Weng;R. Boers
中科院分区：
文献类型：
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作者：
N. Grody;Jiang Zhao;R. Ferraro;F. Weng;R. Boers
先进的微波探测装置（AMSU）最终于 1998 年 5 月在 NOAA 15 卫星上发射升空。提供了使用 23.8 和 31.4 GHz 下的 AMSU 测量值反演海洋上空总可降水量 (TPW) 和云液态水 (CLW) 的算法。对 AMSU 的 CLW 和 TPW 反演结果与使用其他卫星仪器（特殊传感器微波成像仪（SSM/I）和热带降雨测量任务（TRMM）微波成像仪（TMI））和地面辐射计获得的结果进行了广泛的比较。 AMSU TPW 还与无线电探空仪数据进行了比较，所有结果都非常吻合，均方根差异小于 3 毫米，在 5 至 60 毫米范围内偏差小于 1 毫米。尽管 AMSU 和地面传感器的时间序列相互遵循并覆盖相同的 0 - 0.5 mm 动态范围，但 CLW 比较显示出更大的可变性。 AMSU CLW 也与其他卫星测量结果进行了很好的比较，尽管当 CLW 超过 0.5 毫米时 AMSU 和 TMI 之间存在偏差。
The advanced microwave sounding unit (AMSU) was finally launched in May 1998 aboard the NOAA 15 satellite. Algorithms are provided for retrieving the total precipitable water (TPW) and cloud liquid water (CLW) over oceans using the AMSU measurements at 23.8 and 31.4 GHz. Extensive comparisons are made between the AMSU retrievals of CLW and TPW and those obtained using other satellite instruments (Special Sensor Microwave Imager (SSM/I) and Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI)) and ground-based radiometers. The AMSU TPW is also compared against radiosonde data, where all of the results are in good agreement with rms differences less than 3 mm and biases less than 1 mm over the range between 5 and 60 mm. The CLW comparisons show greater variability, although the time series of the AMSU and ground-based sensors follow each other and cover the same dynamic range of 0 - 0.5 mm. The AMSU CLW also compares well with the other satellite measurements, although a bias exists between AMSU and TMI when the CLW exceeds 0.5 mm.