Rapid soil moisture swings analysis

%% Rapid Soil-Moisture Swing Analysis% -------------------------------------------------------------------------% PURPOSE% Detect rapid transitions between drought and pluvial soil-moisture% conditions for an example grid cell from 1950-01-01 to 2021-12-31.%% DPAT: drought-pluvial abrupt transition% PDAT: pluvial-drought abrupt transition%% INPUT% sample.mat contains a 26,298 × 3 daily time-series matrix:% Col 1: root-zone soil-moisture storage [mm H2O]% Col 2: rainfall [mm day^-1]% Col 3: evapotranspiration [mm day^-1]% % METHOD% 1. Calculate net rainfall and dynamic soil-moisture percentile thresholds.% 2. Identify persistent drought and pluvial stages subject to duration and% rainfall constraints.% 3. Detect DPAT and PDAT events when opposing stages occur within 20 days.% 4. Calculate the timing, duration, intensity, and soil-moisture% characteristics of each event. %% OUTPUTS% d2p_date and p2d_date contain the detected DPAT and PDAT events,% respectively.%% DPAT and PDAT are labeled tables containing event dates and calculated% event characteristics.%% plot_sample_decadal_metrics.m summarizes event frequency, transition% duration, and transition intensity at 10-year intervals.%% USAGE% [d2p_date, p2d_date, DPAT, PDAT] = ...% run_sample_example('sample.mat');%% plot_sample_decadal_metrics(d2p_date, p2d_date);% -------------------------------------------------------------------------