Geography IA The Köppen Climatic Classification A. Procedure in Classifying a Climate. 1. Is the station E? If so, is it ET or EF? if not- 2. Is the station B? To determine this, it is first necessary to determine the seasonality of precipitation, s, f, or w. Then test for B (Chart #1). If so, is it BS or BW? If one of these, then is it h or K. Do i, n or v apply? If not B then- 3. Is it A, C, or D? If A, is it f, m or w. (Chart #2). If one of these, do i or g apply? If C, is it f, s or w (as previously deter- mined before testing for B), and is it a, b, or c? Do g, i, x, or v apply? If D is it f, s, w, and is it d, a, b, or c? Does x apply? B. Major Letter Combinations. E climates: ET, EF B climates: BSh, BShs, BShw; BSk, BSks, BSkw; ESn BWh, BWhs, BWhw; BWk, BWks, BWkw; Bwh A climates: Af, Afi, Am, Ami; Aw, Awi, Awg, Awgi C climates: Cfa, Cgb, Cfc; Cgbi, Cfci, Cxa Csa, Csb, Csbi, Csn, Csbnv; Cwa, Cwb, Cwbi, Cwg D climates: Dfa, Dfb, Dfc, Dfd; Dsb Dwa, Dwb, Dwc, Dwd; Dxa, Dxb