我有两个数组：一个有 30 年的观察，另一个有 30 年的历史模型运行。我想计算观测值和模型结果之间的标准偏差，看看模型与观测值的偏差有多大。我该怎么做？
编辑
这是两个数组（每个数字代表一年（1971-2000））：
obs = [ 2790.90283203 2871.02514648 2641.31738281 2721.64453125
2554.19384766 2773.7746582 2500.95825195 3238.41186523
2571.62133789 2421.93017578 2615.80395508 2271.70654297
2703.82275391 3062.25366211 2656.18359375 2593.62231445
2547.87182617 2846.01245117 2530.37573242 2535.79931641
2237.58032227 2890.19067383 2406.27587891 2294.24975586
2510.43847656 2395.32055664 2378.36157227 2361.31689453 2410.75
2593.62915039]
model = [ 2976.01928711 3353.92114258 3000.92700195 3116.5078125 2935.31787109
2799.75805664 3328.06225586 3344.66333008 3318.31689453
3348.85302734 3578.70800781 2791.78198242 4187.99902344
3610.77124023 2991.984375 3112.97412109 4223.96826172
3590.92724609 3284.6015625 3846.34936523 3955.84350586
3034.26074219 3574.46362305 3674.80175781 3047.98144531
3209.56616211 2654.86547852 2780.55053711 3117.91699219
2737.67626953]