initial response to reviews (August 2020)

, Abstract. :::: Land ::::::: surface :::::: models ::::::: (LSMs) :::::::: typically ::::::: simulate :: a :::::: single :::: crop ::: per :::: year ::: in : a ::::: ﬁeld :: or :::::::: location. :::::::: However, :::::: actual :::::::: cropping :::::: systems ::: are ::::::::::: characterized ::: by : a ::::::::: succession :: of ::::::: distinct :::: crop ::::: cycles ::: that ::: are ::::::::: sometimes ::::::::::: interspersed :::: with :::: long :::::: periods :: of :::: bare :::: soil. Sequential cropping (also known as multiple or double cropping) is :::::::::: particularly common in tropical regions, where the crop seasons are largely dictated by the main wet season. The Asian summer monsoon (ASM) provides the water resources rotation :: in :: a ::::::: regional :: 25 :::: km :::::::: resolution ::::::: gridded ::::::::: simulation : . We apply the same method to a regional and 4-single-gridbox simulations for the North Indian states of Uttar Pradesh and Bihar ::: and ::::::: 4-single ::::::: gridbox 15 ::::::::: simulations :::::: across ::::: these ::::: states, :::::: where :::: each ::::::::: simulation :: is :: a :: 25 ::: km ::::::: gridboxto simulate the regular rice–wheat rotation, where there is a variation in growing The inclusion of a secondary crop in JULES using the sequential cropping method does not change the crop growth or development of the primary crop. During the secondary crop growing period, the and energy ﬂuxes for :::::: Avignon :::: and :::: India : an irregular (Avignon ) and regular crop rotation (India single gridboxes) are modiﬁed; they are largely unchanged for the primary crop growing period. ::: For :::: IndiaIn a regular crop rotation, the inclusion of 20 a secondary crop using this sequential cropping method affects the available soil moisture in the top 1.0 m throughout the year, with larger ﬂuctuations in sequential crops compared with single crop simulations even outside the secondary crop growing period. JULES simulates sequential cropping at Avignon, the four India locations and the regional run; representing both crops within one growing in each of the crop rotations presented. This development is a step forward in the ability of JULES to simulate crops in tropical regions, where this cropping system is already prevalent. It also provides the opportunity to assess the potential for other regions to implement sequential cropping as an adaptation to climate change. wheat :: are ::::: grown ::::::::: everywhere ::: and ::: the :::: crops ::: are ::: not ::::: limited ::: by :::: pests ::: and :::::: diseases :: or :::::: nutrient ::::::::: availability, ::::: which ::: will :::: affect ::: the ::::::::: comparison :::: with :: the :::::::::: observations ::: that ::::::: implicitly :::::: include :::: these :::::: aspects. The :::::::::: simulations :::::: shown :::: here ::::::: consider : a ::::: small ::::::: number :: of :::::::: rotations, :::: crops :::: and ::::::: regions. :::::::: However, ::::::: different ::::::: varieties :::: and ::::: types :: of ::::: crops; ::: the ::::::: timings :: of :::::: sowing ::: and :::::::::: harvesting; ::::::: together :::: with ::::: many ::::::: possible :::::::: irrigation ::::::: options ::: can ::::: have : a ::::: large :::::: impact ::: on ::: the ::::: model ::::::: results. :::: This :: is ::: an :::::::: important :::::::::::: consideration ::: for 10 ::::: future :::: work :::: and :::::: should :: be :::::::::: investigated :::: fully ::::: when :::::::: applying ::: this :::::: method ::: to ::: new ::::: areas. : the rice season. The effects of including crops the and are consistent with with a in the India-single than in India-sequential.