{"responseHeader":{"status":0,"QTime":3,"params":{"q":"{!q.op=AND}id:\"14790\"","hl":"true","hl.simple.post":"","hl.fragsize":"5000","fq":"!embargo_tdt:[NOW TO *]","hl.fl":"ocr_t","hl.method":"unified","wt":"json","hl.simple.pre":""}},"response":{"numFound":1,"start":0,"docs":[{"modified_tdt":"2009-06-16T00:00:00Z","thumb_s":"/7c/6f/7c6fdd9ad2f573073a738374ad434c4c2a2d4aa0.jpg","oldid_t":"altaav 467","setname_s":"uu_altaav","file_s":"/70/3e/703e99be951f17bc25322ffd2287e342774a52ac.pdf","title_t":"On_Snow_Cover_Ablation - Page 21","ocr_t":"restriction that for ablation which accentuates surface irregularities the value of CCL is understood to equal or exceed 50 meal cm\" 2 min\" 1 deg\" 1, the additional boundary ( QfB)/ CTL = 8 deg. is determined, which is plotted in Fig. 6 to the. left of the first boundary. For a non- melting surface the boundary between ablation which accentuates irregularities and which reduces them follows from Equation ( 10) dM dxL PppPeCpp L< aZffrr ddxxLL J for in this case the surface temperature / T> depends on CC. . If the term dv/ ad. in ( 22) is eliminated with the aid of the following expression obtained by differentiating the heat balance Equation ( 11) in respect to CC. d* d 0.623 rg dE\\ t 0,623rE \\ / a 0,623 rE „\\ XL j II - I - TTT = ( f r t i - eL - ( fr- l Ej, ( 23) dxL \\ pcp afr/ \\ pcp I \\ pcp I one then obtains the boundary relation dE eL = E + - (& L-&), ( 24) still dependent on ny- , which, together with the heat balance Equation ( 11) containing /\\ r, the relation /\\ r z* 0° C, and plausible assumptions about the limiting value of ( C+ B)/ Ci:, , enables the boundary to be defined. The value - 100 meal cm\" 2 min\" 1 can be regarded as the lower limit of Q+ B, just as 400 meal cm\" 2 min\" 1 was for the upper limit. Together with ( XL= 50 meal cm\" 2 min- 1 deg\" 1, this leads to - 2 deg ^ ( Q+ B)/ fl, - 8 deg. The upper boundary value ( Q+ B)/ Cf, = 8 deg yields the lower of the three curves plotted in Fig. 6. For values of /\\ r and e. whose plotted points lie between this curve and the 20","restricted_i":0,"id":14790,"created_tdt":"2009-06-16T00:00:00Z","format_t":"application/pdf","parent_i":14799,"_version_":1679953304842403842}]},"highlighting":{"14790":{"ocr_t":[]}}}