Coronal holes are well accepted to be source regions of the fast solar wind. As one of the common structures in coronal holes, coronal plumes might contribute to the origin of the nascent solar wind. To estimate the contribution of coronal plumes to the nascent solar wind, we make the first attempt to estimate their populations in the solar polar coronal holes. By comparing the observations viewed from two different angles taken by the twin satellites of STEREO and the results of Monte Carlo simulations, we estimate about 16 – 27 plumes rooted in an area of \(4\times 10^{4}~\text{arcsec}^{2}\) of the polar coronal holes near the solar minimum, which occupy about 2 – 3.4% of the area. Based on these values, the contribution of coronal plumes to the nascent solar wind has also been discussed. A further investigation indicates that a more precise number of coronal plumes can be worked out with observations from three or more viewing angles.

日冕孔被公认为快速太阳风的源区。作为日冕孔中的常见结构之一，日冕羽可能是新生太阳风的起源。为了估算日冕羽对新生太阳风的贡献，我们首次尝试估算日冕极孔中它们的种群。通过比较STEREO双卫星从两个不同角度观察到的观测结果和蒙特卡罗模拟的结果，我们估计大约有16-27个羽状根植于\（4 \乘以10 ^ {4}〜\ text { arcsec} ^ {2} \）极小日冕极孔附近，约占日照面积的2 – 3.4％。基于这些值，还讨论了冠羽对新生太阳风的贡献。进一步的研究表明，可以从三个或更多视角观察到更精确数量的冠羽。